Exclamation of technology obsessed people (h4x0rZ, gamers, even txtmsg freaks) indicating feelings of excitement and satisfaction. I believe it originates from "What now, bitch!" which was shortened to "What!" and then 1337-ized to "w00t".
by Uber Chicken August 26, 2004
Simple Plan is synonymous with dog shit.
by Uber Chicken August 21, 2004