Alt+qq

Using in online gaming, specifically Warcraft III in one of two ways.

1. A way of tricking a n00b in to quitting the game.
2. A term meant to insult or demean a n00b after you pwn them in a game or chat room.

1. "Takes place in Warcraft III game"

Gosuplayer: I pwn you… I have so much gold I will never run out!
N00bplayer: OMFG I knew you hack!
Gosuplayer: ROFL… yes n00b I hack lol
N00bplayer: I report you for resource hack
Gosuplayer: LOLZZZZZ – Alt qq for free gold
N00bplayer has left the game
Gosuplayer is victorious

2. "Takes place in a Warcraft III chat room"

Player 1: WOW I pwnd you hard
Player 2: stfu you go lucky
Player 1: lol stupid n00b
Player 2: Hack more you hacker jew
Player 1: LMFAO!! Don’t cry n00b
Player 1: gfg fegit - Alt qq life now plz
Player 3: ROFL That noob just go pwnd hard

Alt+qq by mac6433 June 7, 2005

alt+Q+Q 

Back in Starcraft this was the command to exit out of game. Friends will then say, "Aww! You QQ'd!" This will later spawn the crying face with the tears.

Dude, why did you alt+Q+Q out of the game?!

alt+Q+Q by The Lemur May 27, 2008