to bust a nut

1 9.9

To release semen during sex and used jokingly to show extreme excitement

idiom
/bʌst ə nʌt/

Offensive

: correrse

When the team won the championship, the fans couldn't help but bust a nut in celebration.

Examples

You've never busted a nut?

The 41–Year–Old Virgin Who Knocked Up Sarah Marshall and Felt Superbad About It (2010)
And all of a sudden, he busted a nut.

The Jesus Rolls (2019)
Until I bust a nut.

All Eyez on Me (2017)
My dad's childhood bed that he busted a nut inside of my mom to create me.
He was so excited about the concert that he could barely wait to bust a nut.
After a long week at work, I just want to relax and bust a nut while watching my favorite show.

Surface Forms

bust a nut infinitive

busted a nut past

busted a nut past participle

busting a nut present participle

busts a nut third person singular

Morphology

bust + a + nut

There is a clear partial link: 'bust' (to break) combined with 'nut' (coarse slang for a male reproductive gland) signals a sexual/vulgar sense, but the specific sense 'to ejaculate' is an idiomatic slang extension rather than a literal composition. A B1 learner who knows both constituents might suspect a sexual meaning or vulgarity but would not reliably infer the precise sense without prior exposure, so it is only partially transparent.

Etymology

Bust a nut may come from the image of bust meaning 'break' and nut meaning a hard seed or a crude word for a man's sexual release. Like cracking a nut and letting something come out, the phrase came to mean 'to ejaculate' or 'to have an orgasm'.