work (one's) 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 consumer conference each year. I don't know what I'd do without them!
See also: backside, off, work
Farlex Dictionary of Idioms.
See also:
  • I've got work to do
  • go shares
  • off
  • offed
  • be at work
  • be your own master/mistress
  • mistress
  • be (one's) own master
  • hard work is not easy
  • off from work