Ones i hate
QQ much - meaning crying much? [Oh i'll show you qq mate im gonna spam your ass with grenades!]
gg - good game after a match everyone spams gg,gg,gg,gg,gg,gg,gg,gg,gg,gg,gg, and so on lol
Just got Raped by so and so - now this one when i first read it in chat i thought whats they going on about. lines like Oh man I just got raped or face raped! meaning they just got hammered by another player or whatever. Using the word RAPE though is scary.