nut up

verb — 2 senses

nut up

verb

/nʌt ʌp/

Etymology From nut + up (influenced by expressions like "man up" or "shut up"; "nut" refers to testicles, symbolically implying being more manly).

1

Slang To show courage and hide one's apprehension.

Synonyms: man up, endure, put up with, take lying down
Related terms: shut up

nut up

verb

Etymology From nut + up, apparently related to go nuts and do one's nut.

1

Slang To lose one's temper, go nuts.

And what if some shit went wrong? Pimp was known to get crazy over minor shit. I didn't know if I could trust him to pull off a job like this without nutting up in the middle of the mix.2006, Noire [pseudonym], Thug-A-Licious: An Urban Erotic Tale, New York, N.Y.: One World, Ballantine Books, →ISBN, page 103:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.