L33t speak (elite speak) is the language of computer geeks and idiots (not mutually exclusive) the wide world over. It's astoundingly annoying to read.
It really doesnt get more simple then l33t speak just replace the letters with numbers but here's a quick "l33t-english" guide to get you started on the road to a life of cold, lonely nerddom
A - 4
E - 3
G - 9
I - 1
O - 0
S - 5/$
T - 7
H4xz0r5 - Hacking or a Hacker
L33t - Leet "Elite"
N00b - even my grandmother knows this one
suxz0r5 - Sucks, you know like your mom
R0x0rz5 - Rocks, like everyone's life but yours
Pwn3d - Owned, getting your ass handed to you like you did through out high school
Pr0n - Porn, the force that holds the universe together and makes the world spin on it's axis
That's it, that's really all you need to know to arm yourself for the big text based nerd off next weekend.