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
Peta	-	English (Australian)
Pastor	-	Spanish, Late Roman
Lal	-	Indian, Hindi, Nepali
Zaina	-	Arabic
Rosamond	ROZ-ə-mund	English
Hildebert	HIL-de-bert	German