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1. Derivitive of the word penis.
There was an intoxicated man dancing on the train with no pants on, his peen was flopping around everywhere!
by Tashimama December 04, 2006
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Jul 29 Word of the Day
Someone who used to be a potential girlfriend/boyfriend, but no longer is.
Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...
by brownsuite September 24, 2011
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3
short for penis. sometimes used in places where saying penis is inappropriate.
guy #1: this is how you do the can-can!

guy #2: FUCK dude, you just kicked me in my peens! watch where you kick asshole!
by dickhaver319Xboxlive3picYOLO September 06, 2013
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4
a common word used to describe the penis
" look at that guys peen..it makes my grandpas look big."
by ak harry March 15, 2005
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5
Is used:
a)to refer a man's penis

b)to describe an unlikable or mean male
a)John has a small peen

b)John is a huge peen!
by LBang October 30, 2005
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