Punch line 意思

Punch line (哏、笑點、精華)

Punch line 是笑話中重點，用來使人發笑的之處（接近中文的「哏、笑點」 ）。
通常位於整個笑話結構的第三段或最後一段。

A punch line concludes a joke; it is intended to make people laugh.
It is the third and final part of the typical joke structure.