I'm pretty easy going about lingo. Racist and homophobic slander is annoying but easily remedied. What I dislike the most is playing with 12 year old kids who have headsets. If they are even the least bit annoying, which is like 95% of the ones I've played with, I will try to kick them even if they are good.

pwned is probably the worse. Little kids deserved to be slapped if they say or type that.  I am glad I don't play any FPS games that have mic.  Sure it helps to tell where they are hiding but it saves me from having to hear some little kid.

i just mock them and go with the flow. its fun, enjoy it and laugh it off. dont take it so serious eh

Another one: "WTF LAAAAG!" (after they fail at killing someone due to their own failness)