work (one's) backside off

(redirected from work their backside off)

work (one's) backside 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 backside off at the gym! Sally and Jim work their backsides off when we hold our user conference—I don't know what I'd do without them!
See also: backside, off, work
References in periodicals archive ?
The batsmen are going to have to work their backside off to score runs," 'Pup' said.