Another guest strip from Real Life Comics.

W00t!! - slang to express joy
Mas73r 0f 7]-[3 ar3na!! = Master of the arena!!
Can j00 f33l 7]-[3 0wnag3?! = Can you feel the ownage?!
Telefrag - In quake, if you teleport in where a person is standing, he gets killed.
Baka = Idiot