work (one's) ass off(redirected from works their asses off)
work (one's) ass off
rude slang To work really hard (on or at something). I know you thought it was just a silly New Year's resolution, but I've been working my ass off at the gym! Sally and Jim work their asses off when we hold our consumer conference each year. I don't know what I'd do without them!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
work your ass (or butt) offwork extremely hard. North American vulgar slang
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work one’s ass offverb
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.