When a male moves his lower abdomen, lower body in a way that causes his " nuts to lock up", or get tangled internally.
My husband was so busy being an asshole, by waving his legs at me while sitting in a lawn chair, that he maneuvered his "nuts lock up" from the rapid movement of his lower body; later requring surgery to be correcred..LMAO #KARMA
by Ms.Kitten82 January 27, 2018
by LOVEMESOMEURBAN October 16, 2010
"Going crazy" or "manning up"
by Melhon96 January 7, 2016
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
(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.
by Neilmiser May 15, 2004
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."
by Buddy-Rey November 7, 2005
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