Dude...
Dont write a newbie guide to Newgrounds if you dont know what you're talking about. First of all:
l337 - l337, which it is popularly beleived originated from Counter Strike, is short-hand for ELITE. Also used by idiots who think they are hackers (and by some gamers) who think that using 'l337 speak' shows that you must know what you're doing and hence not a newbie. l337 speak means that instead of using letters for writing you use numbers or symbols to form those letters. All those other words you have there are examples of l337 speak, even though some of them could use more numbers or symbols to replace letters. The bottom line is that anyone who actually uses this is completely fuckin lame.
w00t - w00t, which probably also came from counterstrike along with all the other l337 speak slang, is like a celebratory whoop. You'd do it when you just kicked everyone's ass in a round, and it woudl usually be accompanied by other bs l337 things. eg. "w00000t!!!1 1 JU57 R0X0R3D Y0U2 B0X02Z!!!1" Or something moronic like that. (Translation: woot i just roxored your boxorz). Roxored your Boxorz is the gayest most pathetic term I've ever come accross ever. You can guess what it means, although you'd probably get it wrong.