bustone's nuts to do something

bust (one's) ass (to do something) & break one's balls to do something & bust one's butt to do something & bustone's nuts to do something

Sl. to work very hard to do something. (The expressions with

balls

and

nuts

are said typically, but not necessarily, of a male. Potentially offensive. Use only with discretion.) •

I've been busting my nuts to get this thing done on time, and now they don't want it!

•

The new boss expects you to bust your nuts every minute you are at work at the warehouse.