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
Iveta	-	Czech, Slovak
Toribio	to-REE-byo	Spanish
Yewande	-	Western African, Yoruba
Karna	-	Hinduism
Wayra	-	Native American, Quechua
Eetu	E:-too	Finnish