Well, technically it isn't a word, but an acronym for 'pussy bitch'. It may pertain to someone who is unwilling to something, or acts in a way that is unappealing. PB can be used in anyway to describe anything, mainly people though. People who are PB's lack in courage, are scared to do new things or scared of people, or just generally suck. No one likes a PB, they're lame and...PB-like. When calling someone a PB it generally encourages them to do something they initially don't want to do :D
Are you crying?... Don't be a little PB!

DID KANYE WEST JUST INTERRUPT TAYLOR SWIFT?! THAT WAS SUCH A PB MOVE!

Ashley, WHY WON'T YOU TELL ME WHAT THEY SAID?! STOP BEING A PB! I WILL SUPER POKE YOU!
by mablenda. January 5, 2010
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A. All right man, it's time to go on stage.
B. How do I look? Everything straight?
A. You got a little PB in the front.
B. PB?
A. Penis bulge, in the front of your pants. Try to tuck it or something before the show starts.
by Aldridge517 June 11, 2012
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YOU know what! Your a being a PB!
A PB?
A Pussy bitch! BITCH!
by Panik 0ne July 11, 2008
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Shit foo, didju get yo Arden Velvet Pillow cover from PB yet? Hows about dem Bellmont Stripe design curtains fo yo crib? Or how 'bout da Bennington Armoire Deluxe set? You seen dat shit? Izoff da hook!
by Assessment January 3, 2004
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Perpetual Boner Syndrome. The act of being extremely horny, normally horny most of the time or anything closely related with being horny.
Timmy, because of the evidence at how often you masturbate, how many nudey mags you have, and the fact that you can't hold a conversation that doesn't have to do with Brazilian waxing, butt play, and/or tits, I have concluded that your have a severe case of PBS.
by T!ff@&?LhuvsYhu July 24, 2011
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Prime Bitch. Person who you call your best friend or 2! Prime is an association for when something, idea, or word grows on you.
Hey Gina! Whaddup PB#1 and PB#2. Those are my Prime Bitches!
by igpman October 25, 2009
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Acronym: Personal Best. Sports term, particularly related with swimming and athletics.
"Man, what a fucking race! I went out in 27.3 and did 58.1, a new PB! Stokz0red"
by brendan September 6, 2004
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