PFB 

Psycho Fuck Bitch: An unreasonable, irrational, demanding, condescending and manipulative person with cruel intentions.

A PFB is person who is hard to work with, be friends with, etc. Untrustworthy. Manipulative. Underhanded. Sly. Evil.

PFB by Angel666_PFB June 11, 2006

PFB 

Potential Fuck Buddy

Regis: How's that PFB coming along?

Jackson: We're meeting up tonight, so you tell me.

PFB by Joy! Fraction Massacre August 7, 2009

pfb 

Short for "Pink fluffy Bunnies". A guild formed in Shadowbane and currently active on the Korgath, World of Warcraft, PvP server.

Recognized for their overwhelmingly superior ability in Player vs. Player combat. It's not uncommon for them to take on numbers twice their own and dominate the opponent.

PfB has an amazing five man team.

pfb by Aegeus October 16, 2006

pfb 

prounounced 'fib' or 'fibbed' to betray a friend.

He callously pfbed his brother.

pfb by bread infection December 28, 2005

PFB 

of or bieng Pillsbury Flow Boy.

pFB is a god and his Pillsbury Flowness is legendary.

PFB by Baron_pFB=KG= December 9, 2003

PFB 

A fast way of saying Pretty Fuckin' Bad, or basically anything that starts with Pretty Fuckin' B______.

Man that chick needs a shower PFB!!

PFB by tony July 10, 2004

PFB 

A short, skinny, always-hyper teenaged girl who takes a lot of stuff too seriously. Enjoys anime and hanging out with her friends. Avoid at all costs. May be distracted by Rurouni Kenshin DVDs and Di Gi Charat mangas.

I think PFB is continuously high on caffeine.

PFB by PinkFluffyBunny (hehe) October 8, 2003