that pretends that he's tough by using 1337
language and fucks up a whole online gaming match, be it Starcraft, WoW, or Halo.
It is different from n00b, who accidentily screws it up, but a n000b does it on purpose.
n000b: 0MG I JUST PWNZORD TEH CRAP 0UTTA THOSE 20 CARRIERS!!! ND DIDNT EVEN TRY 2 ATTACKZORZ!
me: um, that was me, you n000b.