bust a nut

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bust a nut (third-person singular simple present busts a nut, present participle busting a nut, simple past and past participle busted a nut or bust a nut)

1. (slang, vulgar, idiomatic) To ejaculate.

   Synonyms: blow a nut, bust, nut; see also Thesaurus:ejaculate

   • 1938, Richard Hallas, You Play the Black and the Red Comes Up, page 74:

     Genter was so excited he like to bust a nut. He had a telephone plugged in at the table and called people up.

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

   Synonyms: bust one's balls, bust one's butt