n000b
A noob who thinks he's king of the hill just because he knows some 1337 and ruins your game on purpose. He's not clumsy, he's a bully.
He types 'leet' and gets destroyed by a goblin in WoW.
He says 'pwn me' and gets pwned by a kid in Halo.
He shows off his 1337 and loses to a bot in Starcraft.