Definitions by dictionary.com

F - Bomb 

Saying fuck when you probably shouldn't.

*slap*
joe: What the fuck?!
joe's mom: what was that?!
joe's brother: what happened?
me: he just dropped the f-bomb.
joe's brother: he's fucked.

F - Bomb by Dictionary.com March 26, 2003

X13 

Verb. To sing metal songs about people who are but mere puppets in IRC channels. - To ask the state of another person by asking a common question. IE - "How are you?".

I X13.
You X13.
He X13s.

X13 by dictionary.com February 9, 2003