1.
Quality Welsh Counter-Strike player and owner of the Wh00pass Office and Compound 24/7 servers. Famously banned the AWP sniper rifle from his server. Replaced the o's with 0's because the bloke is simply l337.
2.
To 'whoop ass' is to beat someone in an extreme way, a.k.a. 'Owning'.
"Holy shit! Once again that Wh00pass is opening a big can of Wh00pass on all-comers"
(n.) A measure of the net output of w00t from a given body. One can find through simple mathematics that the w00t into a person at any given time is equal to the w00t out of that person. This is why w00tage should be reciprocated.
Tommy: OMFG Billy w00t w00t w00t U R Awesome!
BIlly: So are you! w00t w00t.
Tommy: Wow, our w00tage is disproportional. You can't be my friend now.
Billy: w00t!
Tommy: You are forgiven.