laugh one's ass off

== English == === Alternative forms === laugh one's arse off (UK) === Pronunciation === === Verb === laugh one's ass off (third-person singular simple present laughs one's ass off, present participle laughing one's ass off, simple past and past participle laughed one's ass off) (US, slang, vulgar) Synonym of laugh one's head off (“to laugh uproariously”). ==== Derived terms ====