l33tsp34|<

The full name for the language used by someone who can sp34k l33t. Often simply known as 'l33t'. Sometimes spelled 'l33tspeak'

Hmm, example...

gib

To 'gib' someone. lit: To change someone into giblets, usually by explosion. Not a good thing.

And then I gibbed him!

ownz'ed

Definition and example taken from Megatokyo:
"It's like this, you know, this L33T thing, that you do
when you, like, ownz someone." - Largo

"Oh yeah. I ownz'ed your ass" - Largo

script kiddie

Someone who wants to be a hacker (or thinks they are) but lacks any serious technical expertise.

Nah, he's not a hacker. Just a lonely script kiddie.

gomen

Abbreviation of 'gomenasai'.
Japanese in origin.
Simply means 'sorry'.

Do you really need an example?