knee-slapper

noun knee-slap·per \ ˈnē-ˌsla-pər \

Definition of knee-slapper

: an extremely funny joke, line, or story

First Known Use of knee-slapper

1966

in the meaning defined above

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KNEE-SLAPPER Defined for English Language Learners

knee-slapper

Definition of knee-slapper for English Language Learners

  • : a very funny joke or story


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