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
Troels	-	Danish
LabhrÁS	LOW-raws, LAV-raws	Irish
Sidika	-	Turkish
Edina	-	Hungarian
Iwan	EE-wan (Welsh), EE-vahn (Polish)	Welsh, Polish
Serkan	-	Turkish