Freaked out. Stressed. Going a little crazy
I am sooo nutted up about this interview.
by wstsdgrl March 12, 2008
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hybrid cross between "grow a pair of nuts" and "man up"
Guy 1: "Oh man, I totally wanna bang that chick over there."

Guy 2: "So nut up and do it already!"
by LOVEMESOMEURBAN October 16, 2010
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I'm was so mad, I was nutting up in there!
Why don't you try nutting up and ask her to the dance?
by Melhon96 January 7, 2016
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Dan, Jay and Jeff came out of the corsey and saw some hot girls. Dan and Jay said "hi!!!111oneone" and Jeff said "nut-up!" The girls drove by and flipped us off.
by dFecT June 3, 2004
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(v.) To gird ones loins. Nutting up entails using one's proverbial balls or "nuts". Mainly used on the US west coast, it's the sister (brother?) term to cowboy up.
I better nut up or I'm gonna get my ass kicked in this fight.
by Neilmiser May 15, 2004
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Verb phrase: To involve oneself in a physical altercation, to lose one's cool, or to fly off the handle. A common fixture of urban or "gangsta" vernacular. Recently popularized by a homophobic, black-clad drug-dealing NPC/pedestrian in the controversial PS2 game "Grand Theft Auto: San Andreas."
"Yo, I'm fidd'nduh nut up in a minute!!!"
by Buddy-Rey November 7, 2005
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To suddenly go crazy with no apparent provocation. Especially true with emotional issues that have not been previously resolved but avoided.
"I was talking about waiting another year to get married, and she began to nut up on me."
by CWB August 27, 2005
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