work your backside offwork (your) arse/backside off
British & Australian, very informal, American, very informal to work very hard.
My father worked his backside off to pay for our education.
(redirected from work your 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!