thigh-slapper

That joke about the lost dog was a real thigh-slapper; everyone at the party burst out laughing.

那个关于走失的狗的笑话真是个令人捧腹大笑的笑话；聚会上所有人都哈哈大笑起来。

When my uncle told a thigh-slapper at dinner, I nearly choked on my drink.

晚餐时我叔叔讲了一个令人捧腹的笑话，我差点被饮料呛到。

Her speech was full of thigh-slappers, so the audience could not stop smiling.

她的演讲充满了令人捧腹大笑的笑话，观众们忍不住一直微笑。