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1.
This is a more 1337 variation of uber ownage.

The word ownage is purposely misspelled to elevate the level of 1337ness in said sentence.
Halo2Freak: That was some uber pwnage back there guys. Nice work team. Let's go ask mom to order us a pizza.

Buddy: With pepporoni!?

Halo2Freak: Of course, grasshopper.
by ZT May 09, 2005
 
2.
the direct act of pwning to an extent to which the pwned can feel the pain of his/her charachter's death
DUDE! I just shot you in the head with a rocket! that is some überpwnage!
by HavoChaos September 20, 2007