w00t!

Now what the heck is w00t?

The term "w00t" is a slang interjection used to express happiness or excitement, usually over the Internet. The expression is most popular on USENET posts [1], multiplayer computer games (especially first-person shooters), IRC chats, and instant messages, though use on the World Wide Web in the form of weblogs or in forums is by no means uncommon.

So much so far. I will add my own definition later.