A fork of Rural Dictionary
Losing one's ability to control excitement.
My dog is nutting up because I just got home.
to take one for the team, against most odds, to guard closely (in athletic contests) commonly yelled at Ultimate Frisbee games
Yo Bill, nut up and be my wingman tonite
Nut up on that girl, she's been owning you all day
n. - an unfavorable or adverse situation
My teacher gave us detention - yo, that's the nut-up!