Fun thread.
I guess a lot of these have been posted 5 million times already, but oh well.
I HATE "toon". Whenever I see someone use it I can't help rolling my eyes. Where does that even come from?
"Bio", I find it more disgusting for some reason when someone says "brb bio" than as if they just told me "brb taking a piss" or "brb toilet".
"The bads" or "a bad", it just sounds idiotic.
"Retardin" - "Retadin" is already bad but that takes it one step further. Also because I play - among others - a Ret/Prot Pally and I don't like being called a retard, basically.
People calling an "alt" a "twink", guess that's only common on German servers where no one knows what the crap an alt is and everyone calls their characters who are not their main their "twinks", annoys me a lot but I have to overlook it.
"Dudu" or "drood" for Druid, although I've been guilty of using it as well. :/
"Styles" instead of "skills" - haven't heard that in a long time but gahhh that made me want to rage every time. Again, I have no idea where that even comes from.
"+" for when you are ready/agree with something whatever. Seriously? Are you that lazy?
I'm sure there was more, but I can't remember right now and I believe that's enough. :P