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
Kephas	-	Biblical Greek
Saturnus	-	Roman Mythology
Charles	CHAHR-əlz (English), CHAHRLZ (English), SHAHRL (French)	English, French
Samiya	-	Arabic
Vitalis	-	Late Roman
Janette	JAN-ət, jə-NET	English