Definition of “sit on your arse” - English Dictionary

English

“sit on your arse” in English

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sit on your arse

UK US sit on your ass offensive

to do nothing, especially when you should be doing something:

She just sits on her arse all day, while I do all the work.

(Definition of “sit on your arse” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)