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
Keila	-	English (Modern)
Patrick	PAT-rik (English), pat-REEK (French), PAHT-rik (German)	Irish, English, French, German
Kennet	-	Swedish, Norwegian, Danish
Ira	['aiərə]
Justine	[dʒə'sti:n]
Reetta	RE:T-tah	Finnish