bust (one's) ass

rude slang To work very hard. I've been busting my ass studying for this exam, so I really hope I get a good grade. We can't blow off Holly's party—she's been busting her ass cooking and cleaning and getting everything ready for company.

Common Names:

Name	Pronounced	Usage
Sauda	-	Eastern African, Swahili
LoÍS	-	Occitan
Marian	['mɛəriən]
Moyra	-	Irish, Scottish
Alston	['ɔ:lstən]
Democritus	-	Ancient Greek (Latinized)