bust one's balls

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bust one's balls (third-person singular simple present busts one's balls, present participle busting one's balls, simple past and past participle busted one's balls or bust one's balls)

1. (idiomatic, vulgar) To work very hard; to put in a lot of effort.

• bust one's arse
• bust one's butt

• bust someone's balls

• bust a nut