FB 

basically, to sum it up for you, fb means hotter than you.

wow. that girl over there is reaaally an fb.

FB by an fb July 28, 2008

fb 

short for fallen bot. A wonderful channel bot for IRC that is great at removing nazi scum from your channel.

pixelmixer: HEIL HITLER!
nettocash: pixelmixer, fb will show you the door.
nettocash: .kb pixelmixer Sorry, we do not allow users who fuck their sisters in here.. go somewhere else you waste of life imbred fucker
* fallen sets mode: -v+b pixelmixer *!*@c-XX-XX-XXX-XXX.hsd1.de.comcast.net

* pixelmixer was kicked by fallen ((fallen) Requested by nettocash. (Sorry, we do not allow users who fuck their sisters in here.. go somewhere else you waste of life imbred fucker))
compro: whos fb?
nettocash: short for fallen bot
sith: fallen FTMFW!!!!

fb by Netto Cash November 3, 2009

fb 

Fat Bastard, a person with more than acceptable body fat percentage. Usually synergistic with being a whiney git with personal hygine issues.

That fucking FB stole my Jaffa Cakes.

fb by Trev October 3, 2003

fb 

Firebush!!!!!!!!!!!!! Usually red heads have a fb.

Bridget has a fb.

fb by Bri January 17, 2004

FB 

acronym used for finger bang when someone shoes their fingers into a girls pussy like a penis during sex.
Sometimes used over instant messaging sich as msn so you don't ahve to typ out both words.
eg: A: hey
B: hey y u l8?
A: at lunch?
B: ya where were u?
A: I was FB Jane
B: o
A: ya dat bitch was orgasiming for 10 min
B: lol u da man

"yo why u late man?"
" I fb amanda"
"damn homie u pimp"

FB by sexybitch March 6, 2005

fb 

Fruit Bowl - Male bends over with pants down, in the mooning position, and thrusts his organ between his legs
so that views get the whole package resembling a fruit bowl.

Those girls look like they love cock! Lets "fb" them.

fb by Todd Maur October 27, 2001

fb 

Short for Fruity Bitch.

That girl is crazy!
Yeah, she's one FB.

fb by Jenn May 6, 2005