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
Lalita	-	Hinduism, Indian, Hindi, Marathi
Breanne	bree-AN	English (Modern)
Dawson	['dɔ:sn]
TÓFa	-	Ancient Scandinavian
Giacoma	JAH-ko-mah	Italian
TÕNis	-	Estonian