Word
knee-slapper
/ˈniːslˈæpə/
noun
令人捧腹的笑话；大笑话
an extremely funny joke or remark
那种使人笑得拍大腿的笑话
In use
My colleague opened the meeting with a knee-slapper, and even the boss cracked a smile.
That knee-slapper she shared at lunch was so funny that I had to save it in my notes.
His set is full of knee-slappers, so you’ll definitely laugh more than once.
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY.