To be "Prepared For Butt Sex"
Dude1: Hey dude, do you have any lube?
Dude2: Umm... Why?
Dude1: Well this girl promised me that i could put it in her anus but i don't wanna go in dry.
Dude1: Oh! ask Kyle! he's always PFBS! ;)
by TheyCallMeStoner November 14, 2010
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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.
by PinkFluffyBunny (hehe) October 9, 2003
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Psycho Fuck Bitch. A person who is abvolutely intolerable.
A PFB is a person who makes your life a living hell, or HELLen. EVIL.
by Angel666_PFB June 6, 2006
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An acronym for "personality face body." Often using a scale from 1 to 10 ( with the occasional negative), it is characterized by its common use by males for judging a female.
"Hey, Man, PFB Jessica Alba."

"That's easy, 8 9 9."

"Dude...are you a queer?"
by Mac013 November 3, 2009
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An English legend at RuneScape. Well Respected PKer among the infamous "Pink Fluffy Bunny" Team. Well known for dieing with a lot of risk.
Omfg look its bwuk im pfb. PFB OWNS!
by PFB Legends June 13, 2010
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Potential (or Probable) Fuck Boy
"I'm not going to waste my time on a PFB."

"If I were you, I'd take it slow. From what I've heard, he's a PFB."
by notinterested July 28, 2017
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