People at my school mostly just go "You mad, bro?" or "WHAT A NOOB!" It's really damn annoying, because
A.) Nobody's mad, they just think they're amazing trolls, which they are far from, and the only annoying thing they do is repeatedly say "You mad, bro?" without knowing where it came from or what it really is
B.) Noob is ridiculously old, and it's annoying as hell, because it means "one who is new to something," but they seem to use it like one would use "Idiot"