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
Eugenia	e-oo-KHE-nyah (Spanish), e-uw-GEN-yah (Polish), yoo-JEE-nee-ə (English), yoo-JEEN-yə (English)	Italian, Spanish, Romanian, Polish, English, Ancient Greek (Latinized)
Keaton	KEE-tən	English (Modern)
Wine	-	Anglo-Saxon
Aamina	-	Arabic
Beorhtsige	-	Anglo-Saxon
Owen	['əuin]