(slang, idiomatic, somewhat, vulgar, North America) To work exceptionally hard.
I've been busting my butt getting the tent fixed, while you're just sipping cocoa. Give me a hand.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.