Top Definition
(adjective) hard or erect
as soon as she dropped her underpants, I was up.
by Jake January 16, 2004
U-ndercover P-artyer Someone who is quiet most the time usually at school but knows how to party on weekends.
Hes a major U.P. NUKKA!
by CHILLZ1127 June 08, 2006
A form of agreeing or calling people´s attention to a previous post/comment at a forum/article.
Guy: Help me with this stuff!
-no replies-
Guy: up.

Comment on an Article:
I like it so up the damn quote already!
by Akmaur February 05, 2007
Term used by car salesman to describe individuals who walk into their lots for the first time.
Joe took 6 ups today without making a single deal.
by Shahin January 31, 2005
short for shut the fuck up
also can be used by pointing up...up
Random Person 1: what are you doing later?
Dickhead: Up
by chunksup August 27, 2008
to be high, usually on marijuana
Wanna go get up man?

Yo, you tryin to get up?
by martin brown October 25, 2006
1. leaving; going anywhere besides where you are

2. getting out of somewhere quick.
1. "i'm up, i'll see u later"

2. "i seen a cop down the alley, i was up"
by j gouche October 19, 2006
north of da bridge.
I was born in the U.U.P.!!!
by rusty September 10, 2003

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