Either walk your talk and prove your worth or toughness, or keep your pie hole shut and get the hell outta town.
Keep running your mouth...either rise to the occasion and let me thrash your ass when I grab that stack of dimes you call a neck, or refrain from further trash talk. Take your pick!!
by weave March 25, 2003
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A not so typical picture of a dick taOR from approximately knee height (easier to take with longer arms or while squatting) angled in the upward direction in order to showcase both the nuts and dick. Be sure to have an erect dick or run the risk of appearing to simply have three nuts. Be sure to avoid anus, but if not possible, be sure to cover with emoji.
Women love surprise nut-updick pics! OR
Did you get his nut-up dick pic?! What a great angle!
by Hahaballs February 13, 2021
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Squirrel for: Taking up arms (i.e. getting ready to battle).

First coined in the Sears Commercial 'Squirrel Revolt'.
(Man walks in with wife to display a bunch of squirrels cutting coupons for them)
(Head Squirrel flips table)

Squirrel: We're tired of you humans and your tyranny! Nut Up my Brothers!

(Squirrels proceed to attack the humans and vandalize their property)
by My pseudonym is already in use October 24, 2013
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either pull your dick out and ejaculate and go do you task or shut up
Frank: Dude i gonna ask out debbi

Ron: Dude, nut up or shut up
by lost shadow kid April 1, 2010
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It means that you either gotta whip your dick out, nut it up, and get your shit done, or stop talking, sit down, and keep quiet.
Person 1: My throat hurts really bad this morning, but I won’t complain. You know what they say, nut up or shut up.
by PastelPearlie November 11, 2017
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Neither walking your talk or being silent. Just simply being able to walk your talk but choosing not to talk about it
Grandma was listening to young guapa talk about how he made 7 figures in 1 year, Grandpa said “NUT UP AND SHUT UP, NIGGA no one gives a dayum about that shit mothafucka”. Young Guapa proceeded to ask why and grandma continued with “Because we got trillions from our investment account but you don’t hear us talking about it because we stay humble my g, stay bussin and silent my nigga”.
by GiganticButtfest October 15, 2021
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Time to grow some ball's like a man, or back down like a pussy
man pussy bitch Bob- man Im afraid to ask that chick out.
Me- it's time to nut up or shut up.
by Richhomienyquan October 30, 2016
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