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Personal Best; a new high score at anything, good or bad.
John: "Hey look, Nick just set a new PB on rejections tonight."

Matt: "Ya man, what's that his third at this bar?"
by TheBiggestDick March 31, 2012
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1. acronym for Perv Boy or Pervert Boy
-a term you use on a sincere sweet man but you realize that he's also a closet horny, playful, naughty dude.

2. also stands for Pretty Boy
-handsome, attractive, smart, hott, cute guy

3. definitions of 1 and 2 combined
1. Aisha: "Aiyy Brian! You're bad, but I love you because you're my P.B.!"
Brian: "Yea, I know you like it! hehe because I'm you're P.B.! I love you, Aisha, you're my P.G.!"
(for the meaning of P.G., please look up P.G. in the urbandictionary).

2. Wabbit: "bBoy is a P.B.! Grrr, I love his belly.. He's hott!!!"
by chinat February 21, 2006
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an acronym for 'peanut butter' or when something is the opposite of jelly

i.e when something is suspect (suss) or lacking swag on a dime.

G-pa: Yo man, that girl that came to class didnt even brush her hair like. Shes lookin real dirt wit dat nappy hair and yellow teeth

Puff: Eww, PB! PB!

G-Pa: Word, straight peanut butter minus the jellay.
by SuperPuff April 05, 2010
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The atomic symbol for Lead; a soft, malleable, ductile, bluish-white, dense metallic element, extracted chiefly from galena and used in containers and pipes for corrosives, solder and type metal, bullets, radiation shielding, paints, and antiknock compounds.

Lead (Pb) is another word for the bullets that you put into, and shoot out of a gun.
I like to make Pb sandwiches.

I opened fire with my MP5k and filled the fool full of Pb.
by Kenthar April 16, 2004
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