Short for "green up"; the act of signaling readiness to play in the lobby of the online PS2 game Socom 2.
Impatient PS2 Nerd: What the hell is taking so long? G up already!
by Jeff Foxworthy June 26, 2004
G up is similair to the phrase "fire it up" It refers to becoming prepared; to bring your A game; or go balls to the wall.
As heard by Theo on MTV battle of the sexes: " Come on Robin, G up baby!"
by Max Wittler January 25, 2005
noun - The college freshman who took his high school girlfriend to prom; little does he know that she's going to be more run through than the autobahn once she enters college herself. Cousin of the classic beta male.
Example 1:
"that guy that came into our store with his high school prom date was the epitome of gup!"

Example 2:
Employee 1 - What kid brings their high school girlfriend to a casino after prom for ice cream?!
Employee 2- A straight gup, that's who!
having large wings
The eagle will need gup to fight a storm
by seabird21 April 09, 2013
1. (adj.) - generally bad; "gup" could apply to a person, action, object, situation, condition, etc.
2. (n.) - a person who might be considered rude, malicious, or unpleasant in any way.
3. (v.) - to go out of one's way to make another's life worse; to bother, taunt, bully, disrupt, provoke, etc.
- to let someone down or fail to meet certain expectations of oneself
4. (int.) - an exclamation of disapproval or discontent

Variations of "gup" include:
- gupped: having been screwed over by a person or an incident
- gup outta here: a phrase (slang) used by the speaker to indicate that he/she no longer enjoys or tolerates the presence of another individual or group and would be happier if the unwanted individual or group left the scene.
- gup that: a command/exclamation, simply meaning "hell no"

see also guppy
1. Aw man dude, we're out of funky juice... That's gup.
2. Dude, Billy stole my ball. The kid is such a gup.
3. Don't invite Joey... He's always guppin dude, I can't stand him.
4. *flat tire* GUP.
5. Joey: "Hey man, you wanna come to my ballet recital?"
Liam: "Nah gup that dude..."
6. You heard about Nate dude? He bought a loaf of challah for $5.49 at Whole Foods, and they only cost $3.29 at Panera. He got gupped hard.
by Buffalo Jones May 20, 2013
To make someone feel bigger, better, than they really are.

To lie and shmooze someone in order to take advantage of them.
Sometimes you gotta G up people to get your slice of the pie.

Yo that chick g'd you up for a free drink on your tab, sucka.
by Ragingclown September 20, 2013
A term used commonly in London to describe the action of being snitched on by somebody, to the police. Short for Grassed On.

"Gee'd up"
"G up"
Bubba1: "I can't believe that pussy G'd you up."

Bubba2: "I'm gonna jook him when I finish my bird!"
by Liquifux August 05, 2004

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