QQ (internet slang) = complaining/whining/crying bitterly over a computer game
Actually that's not right. It origonally meant to quit, ether because you were losing or you were really bad/unskilled.
It was later on when all those noobs (damn kids! Get off my videogames!) thought it looked like crying eyes and started to use it like that.
The QQ comes from the Warcraft games (the strategy ones, not the MMO) where QQ was the options menu to quiet the game/program.
Now hope all you kids learned something today.