Work your ass off - Idioms by The Free Dictionary
work your ass off
Also found in: Acronyms
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 user conference—I don't know what I'd do without them!
work your ass (or butt) off work extremely hard. North American vulgar slang
References in periodicals archive
Theater is good for your soul, but you're paid little money and you work your ass off
and few people see it,'' says Harris.
I know what it's like to work your ass off
on things that don't completely come together.