punch line

American  

noun

1. the climactic phrase or sentence in a joke, speech, advertisement, or humorous story that produces the desired effect.

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punch line British  

noun

1. the culminating part of a joke, funny story, etc, that gives it its humorous or dramatic point

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Etymology

Origin of punch line

An Americanism dating back to 1920–25

Example Sentences

Chinese culture may be of genuine interest to many users, but online, it’s destined to become an exotic punch line.

From Slate • Mar. 13, 2026

The studio was also the punch line when the host was praising the success of “Sinners.”

From Los Angeles Times • Jan. 11, 2026

They had to train with a gun, for example, and, more important, let go of the need for punch line.

From Los Angeles Times • Sep. 25, 2025

“The end,” Feghali delivered her punch line as she read the story for a smaller group a while later.

From Los Angeles Times • Jul. 16, 2025

I always think of the right punch line thirty seconds to three days after the setup; Libby’s working on my reflexes.

From "Better Nate Than Ever" by Tim Federle