work (one's) butt off(redirected from work his butt off)
work (one's) butt off
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 butt off at the gym! Sally and Jim work their butts 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 one’s butt offverb
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.