gg 

good god

mainly used at the end of the round/game as polite, or sarcastic remake indicating the person that pwned joo in da game got lucky

gg u r a fookin haxorz

gg nubs hax

gg ur mama

gg by warcraft November 27, 2003

GG 

Means group gummer, when you get your dick sucked by more then one gurl, or you and your friends get your dick sucked by the same gurl, well just more then 2 people.

mmm lets go to the bedroom baby, i think tommys in there, you down with a GG?

GG by DJ Insignia January 13, 2008

gg 

1- Gaming Genesis
2- Good Game

He is such a GG!
---
Player1: GG
Player2: STFU that was not a good game, we lost horribly!

gg by GG-Underground February 9, 2010

gg 

Is declared when something is ultimately over and done with

Hey, we going the well now

<rope breaks>

observer: gg....

gg by ThirstyCow July 29, 2010

GG 

Someone who is so incredibly obnoxious that they make one’s stomach turn (or make one ‘gag’). This type of person could have delusional tendencies, grandiose behavior, be a pathological liar, may have a tendency to exaggerate and alienate one’s friends.

If someone does or acts in such a behavior or displays this behavior one could be acting like a GG or doing a GG. Also, if one sees behavior that displays these qualities they could want to GG (gag due to seeing this particular type of behavior)

Lady #1: Oh, Carol is so mean! Did you see how she yelled at me like that? Lady #2: Girl, don’t you be pulling a GG on me, you know she didn’t yell!

John Doe: Did you meet Tom at the board meeting last night? I almost GG’d after listening to him go on and on about himself.

GG by Spencer O’Rielly March 1, 2009

GG 

Abbreviation for "Good God." Used to declare dissatisfaction with the actions of a nub. Also can be used to show dissatisfaction with fellow players.

gg eos you're such a nub plant the bomb gg

gg eos sux with an ak

GG by Fashnek February 7, 2003

gg 

Gank Group

A group of people in an online game such as DAOC that specialize in killing other players quickly.

Man, that GG rolled over the hill and pwned us in about 3 seconds.

gg by Anxst May 10, 2004