diff --git a/README.md b/README.md
index 8b69868222..3f53ee6faa 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,7 @@ require("babylon").parse("code", {
 | `importMeta` ([proposal](https://github.com/tc39/proposal-import-meta)) | `import.meta.url` |
 | `bigInt` ([proposal](https://github.com/tc39/proposal-bigint)) | `100n` |
 | `optionalCatchBinding` ([proposal](https://github.com/babel/proposals/issues/7)) | `try {throw 0;} catch{do();}` |
+| `throwExpressions` ([proposal](https://github.com/babel/proposals/issues/23)) | `() => throw new Error("")` |
 
 ### FAQ
 
diff --git a/ast/spec.md b/ast/spec.md
index 596acb462e..28695b477a 100644
--- a/ast/spec.md
+++ b/ast/spec.md
@@ -736,7 +736,7 @@ A unary operator expression.
 
 ```js
 enum UnaryOperator {
-  "-" | "+" | "!" | "~" | "typeof" | "void" | "delete"
+  "-" | "+" | "!" | "~" | "typeof" | "void" | "delete" | "throw"
 }
 ```
 
diff --git a/src/parser/expression.js b/src/parser/expression.js
index 6e97527d71..f97f3f9f76 100644
--- a/src/parser/expression.js
+++ b/src/parser/expression.js
@@ -324,6 +324,10 @@ export default class ExpressionParser extends LValParser {
       const update = this.match(tt.incDec);
       node.operator = this.state.value;
       node.prefix = true;
+
+      if (node.operator === "throw") {
+        this.expectPlugin("throwExpressions");
+      }
       this.next();
 
       const argType = this.state.type;
diff --git a/src/tokenizer/types.js b/src/tokenizer/types.js
index 59ebcd52d0..83f0bb0719 100644
--- a/src/tokenizer/types.js
+++ b/src/tokenizer/types.js
@@ -165,7 +165,7 @@ export const keywords = {
   if: new KeywordTokenType("if"),
   return: new KeywordTokenType("return", { beforeExpr }),
   switch: new KeywordTokenType("switch"),
-  throw: new KeywordTokenType("throw", { beforeExpr }),
+  throw: new KeywordTokenType("throw", { beforeExpr, prefix, startsExpr }),
   try: new KeywordTokenType("try"),
   var: new KeywordTokenType("var"),
   let: new KeywordTokenType("let"),
diff --git a/src/types.js b/src/types.js
index 846d74b451..b444606733 100644
--- a/src/types.js
+++ b/src/types.js
@@ -423,7 +423,8 @@ export type UnaryOperator =
   | "~"
   | "typeof"
   | "void"
-  | "delete";
+  | "delete"
+  | "throw";
 
 export type UpdateExpression = NodeBase & {
   type: "UpdateExpression",
diff --git a/test/fixtures/experimental/throw-expression/comma/actual.js b/test/fixtures/experimental/throw-expression/comma/actual.js
new file mode 100644
index 0000000000..a4ccb189b4
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/comma/actual.js
@@ -0,0 +1,3 @@
+function test() {
+  (throw 1, 2);
+}
diff --git a/test/fixtures/experimental/throw-expression/comma/expected.json b/test/fixtures/experimental/throw-expression/comma/expected.json
new file mode 100644
index 0000000000..77b94cdde9
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/comma/expected.json
@@ -0,0 +1,184 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 35,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 35,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "FunctionDeclaration",
+        "start": 0,
+        "end": 35,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 9,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 9
+            },
+            "end": {
+              "line": 1,
+              "column": 13
+            },
+            "identifierName": "test"
+          },
+          "name": "test"
+        },
+        "generator": false,
+        "expression": false,
+        "async": false,
+        "params": [],
+        "body": {
+          "type": "BlockStatement",
+          "start": 16,
+          "end": 35,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 16
+            },
+            "end": {
+              "line": 3,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ExpressionStatement",
+              "start": 20,
+              "end": 33,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 15
+                }
+              },
+              "expression": {
+                "type": "SequenceExpression",
+                "start": 21,
+                "end": 31,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 3
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 13
+                  }
+                },
+                "expressions": [
+                  {
+                    "type": "UnaryExpression",
+                    "start": 21,
+                    "end": 28,
+                    "loc": {
+                      "start": {
+                        "line": 2,
+                        "column": 3
+                      },
+                      "end": {
+                        "line": 2,
+                        "column": 10
+                      }
+                    },
+                    "operator": "throw",
+                    "prefix": true,
+                    "argument": {
+                      "type": "NumericLiteral",
+                      "start": 27,
+                      "end": 28,
+                      "loc": {
+                        "start": {
+                          "line": 2,
+                          "column": 9
+                        },
+                        "end": {
+                          "line": 2,
+                          "column": 10
+                        }
+                      },
+                      "extra": {
+                        "rawValue": 1,
+                        "raw": "1"
+                      },
+                      "value": 1
+                    },
+                    "extra": {
+                      "parenthesizedArgument": false
+                    }
+                  },
+                  {
+                    "type": "NumericLiteral",
+                    "start": 30,
+                    "end": 31,
+                    "loc": {
+                      "start": {
+                        "line": 2,
+                        "column": 12
+                      },
+                      "end": {
+                        "line": 2,
+                        "column": 13
+                      }
+                    },
+                    "extra": {
+                      "rawValue": 2,
+                      "raw": "2"
+                    },
+                    "value": 2
+                  }
+                ],
+                "extra": {
+                  "parenthesized": true,
+                  "parenStart": 20
+                }
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/experimental/throw-expression/comma/options.json b/test/fixtures/experimental/throw-expression/comma/options.json
new file mode 100644
index 0000000000..7605cf2deb
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/comma/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["throwExpressions"]
+}
diff --git a/test/fixtures/experimental/throw-expression/expression/actual.js b/test/fixtures/experimental/throw-expression/expression/actual.js
new file mode 100644
index 0000000000..5507d7486d
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/expression/actual.js
@@ -0,0 +1,3 @@
+function test() {
+  (throw 1);
+}
diff --git a/test/fixtures/experimental/throw-expression/expression/expected.json b/test/fixtures/experimental/throw-expression/expression/expected.json
new file mode 100644
index 0000000000..14f3d23c12
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/expression/expected.json
@@ -0,0 +1,145 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 32,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 32,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "FunctionDeclaration",
+        "start": 0,
+        "end": 32,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 9,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 9
+            },
+            "end": {
+              "line": 1,
+              "column": 13
+            },
+            "identifierName": "test"
+          },
+          "name": "test"
+        },
+        "generator": false,
+        "expression": false,
+        "async": false,
+        "params": [],
+        "body": {
+          "type": "BlockStatement",
+          "start": 16,
+          "end": 32,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 16
+            },
+            "end": {
+              "line": 3,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ExpressionStatement",
+              "start": 20,
+              "end": 30,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 12
+                }
+              },
+              "expression": {
+                "type": "UnaryExpression",
+                "start": 21,
+                "end": 28,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 3
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 10
+                  }
+                },
+                "operator": "throw",
+                "prefix": true,
+                "argument": {
+                  "type": "NumericLiteral",
+                  "start": 27,
+                  "end": 28,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 9
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 10
+                    }
+                  },
+                  "extra": {
+                    "rawValue": 1,
+                    "raw": "1"
+                  },
+                  "value": 1
+                },
+                "extra": {
+                  "parenthesizedArgument": false,
+                  "parenthesized": true,
+                  "parenStart": 20
+                }
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/experimental/throw-expression/expression/options.json b/test/fixtures/experimental/throw-expression/expression/options.json
new file mode 100644
index 0000000000..7605cf2deb
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/expression/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["throwExpressions"]
+}
diff --git a/test/fixtures/experimental/throw-expression/logical/actual.js b/test/fixtures/experimental/throw-expression/logical/actual.js
new file mode 100644
index 0000000000..aca983fc58
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/logical/actual.js
@@ -0,0 +1,3 @@
+function test() {
+  true && throw 1;
+}
diff --git a/test/fixtures/experimental/throw-expression/logical/expected.json b/test/fixtures/experimental/throw-expression/logical/expected.json
new file mode 100644
index 0000000000..9567c711e4
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/logical/expected.json
@@ -0,0 +1,175 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 38,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 38,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "FunctionDeclaration",
+        "start": 0,
+        "end": 38,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 9,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 9
+            },
+            "end": {
+              "line": 1,
+              "column": 13
+            },
+            "identifierName": "test"
+          },
+          "name": "test"
+        },
+        "generator": false,
+        "expression": false,
+        "async": false,
+        "params": [],
+        "body": {
+          "type": "BlockStatement",
+          "start": 16,
+          "end": 38,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 16
+            },
+            "end": {
+              "line": 3,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ExpressionStatement",
+              "start": 20,
+              "end": 36,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 18
+                }
+              },
+              "expression": {
+                "type": "LogicalExpression",
+                "start": 20,
+                "end": 35,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 2
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 17
+                  }
+                },
+                "left": {
+                  "type": "BooleanLiteral",
+                  "start": 20,
+                  "end": 24,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 2
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 6
+                    }
+                  },
+                  "value": true
+                },
+                "operator": "&&",
+                "right": {
+                  "type": "UnaryExpression",
+                  "start": 28,
+                  "end": 35,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 10
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 17
+                    }
+                  },
+                  "operator": "throw",
+                  "prefix": true,
+                  "argument": {
+                    "type": "NumericLiteral",
+                    "start": 34,
+                    "end": 35,
+                    "loc": {
+                      "start": {
+                        "line": 2,
+                        "column": 16
+                      },
+                      "end": {
+                        "line": 2,
+                        "column": 17
+                      }
+                    },
+                    "extra": {
+                      "rawValue": 1,
+                      "raw": "1"
+                    },
+                    "value": 1
+                  },
+                  "extra": {
+                    "parenthesizedArgument": false
+                  }
+                }
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/experimental/throw-expression/logical/options.json b/test/fixtures/experimental/throw-expression/logical/options.json
new file mode 100644
index 0000000000..7605cf2deb
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/logical/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["throwExpressions"]
+}
diff --git a/test/fixtures/experimental/throw-expression/not-enabled/actual.js b/test/fixtures/experimental/throw-expression/not-enabled/actual.js
new file mode 100644
index 0000000000..a4ccb189b4
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/not-enabled/actual.js
@@ -0,0 +1,3 @@
+function test() {
+  (throw 1, 2);
+}
diff --git a/test/fixtures/experimental/throw-expression/not-enabled/options.json b/test/fixtures/experimental/throw-expression/not-enabled/options.json
new file mode 100644
index 0000000000..47934f7082
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/not-enabled/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "This experimental syntax requires enabling the parser plugin: 'throwExpressions' (2:3)"
+}
diff --git a/test/fixtures/experimental/throw-expression/statement/actual.js b/test/fixtures/experimental/throw-expression/statement/actual.js
new file mode 100644
index 0000000000..a40fcbd4fe
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/statement/actual.js
@@ -0,0 +1,3 @@
+function test() {
+  throw 1;
+}
diff --git a/test/fixtures/experimental/throw-expression/statement/expected.json b/test/fixtures/experimental/throw-expression/statement/expected.json
new file mode 100644
index 0000000000..35c16d0838
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/statement/expected.json
@@ -0,0 +1,123 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 30,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 30,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "FunctionDeclaration",
+        "start": 0,
+        "end": 30,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 9,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 9
+            },
+            "end": {
+              "line": 1,
+              "column": 13
+            },
+            "identifierName": "test"
+          },
+          "name": "test"
+        },
+        "generator": false,
+        "expression": false,
+        "async": false,
+        "params": [],
+        "body": {
+          "type": "BlockStatement",
+          "start": 16,
+          "end": 30,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 16
+            },
+            "end": {
+              "line": 3,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ThrowStatement",
+              "start": 20,
+              "end": 28,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 10
+                }
+              },
+              "argument": {
+                "type": "NumericLiteral",
+                "start": 26,
+                "end": 27,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 8
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 9
+                  }
+                },
+                "extra": {
+                  "rawValue": 1,
+                  "raw": "1"
+                },
+                "value": 1
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/experimental/throw-expression/statement/options.json b/test/fixtures/experimental/throw-expression/statement/options.json
new file mode 100644
index 0000000000..7605cf2deb
--- /dev/null
+++ b/test/fixtures/experimental/throw-expression/statement/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["throwExpressions"]
+}