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
Slava	-	Russian, Slovene, Croatian
Llinos	LEEN-aws, LIN-aws	Welsh
Myra	MIE-rə	English
Charis	KAR-is (English)	Ancient Greek, English (Rare)
Jacob	['dʒeikəb]
Clementius	-	Late Roman