The term "w00t" (IPA pronunciation: [wut]) is a slang interjection used to express happiness or excitement, often expressed via the Internet. It is commonly pronouced "woot" by some gamers. The expression has been used in Usenet posts [1], multiplayer computer games (especially first-person shooters), the IRC and SILC chat protocols, instant messages, weblogs, and web forums. "WOOT!" was often found to be a popular celebratory term used to spam over chat channels in a game called EverQuest, when a group of players was successful in achieving their goal in the game.
"w00t" is sometimes used as an abbreviation for "we own other teams". In the video game Halo, originally made by Bungie Studios for the Xbox video game console, the characters of the Sangheili, or Elites, would make a sound like "wortwortwort" after killing someone.
Another meaning for "w00t" has been known to arise out of Dungeons and Dragons in recent years, in which it has the "portmanteau" meaning of, "Wow! Loot!", typically exclaimed upon the discovery of a vast treasure pile, or a single item of particular importance.
An alternative derivation for this term can be found in the hacking/cracking scene. The administrative account on Unix-like systems is usually named "root". One of the aims in cracking a system of this type is gaining "root" access, and hence full control of the system. Under this derivation "w00t" is a leetspeak corruption of the word "root", used as a general exclamation of victory.
Also used to express desire - an acronym of I want one of those is Iwoot = abbreviated to want one of those - woot. It is sometimes also used as another expression for question "what?" if used with a question mark (as "w00t?").