when a guy gets very arroused by a female, but she decides not to let him inside. hes hard, but she dont want it.
girl: what i do is i make out with him, and he gets hella hard, then he says "babe lets have sex" but i say no.
girl2: oh shit, why would you give him blue balls girl?!
by mrszxbryant May 31, 2009

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a lame excuse guys use to get girls in the sack
pain felt when a dude is left unfinished
Man my blue balls just wont quit you
by dundlegrundleberrycherry February 25, 2003

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When a girl gives you a blowjob and she never lets you cum in her mouth. She leaves you unfinished and you get blue balls, a horrible pain.
Man: OH MY FKN GOD! You never finished! Now I have blue balls.

Woman: *laughs*
by KD321 May 19, 2007

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An abstract object, most often encountered by randomly selecting them from urns.

Such urns typically also contain red balls, black balls, white balls, and yellow balls.

Used to hilarious effect in example problems written in probability textbooks, either by clever trolls or by well-meaning mathematicians who are hideously behind the times.
An urn contains 500 red, 1200 white, 300 yellow, and 600 blue balls. 430 balls are selected at random. What is the probability of selecting an even number of blue balls?

Ans: One, if you're at a LAN party or Star Trek convention.
by Trinadtsat Tomitsu December 31, 2012

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blue balls is a form of power over men for women. when a woman feels that a man is not giving her the respect she deserves, that he has a small dick or is unattractive, that she wants revenge for whatever reason or is angry at the man, she will sexually arouse the man, but not give him the satisfaction of ejaculation. after a long time, this creates intense pain in his balls, and the woman can feel the sweet, sweet joy of power that women, in our culture, seldom feel over men.
"He was being an asshole and telling me that I would be a great notch in his belt. So I gave him blue balls... that should teach him to talk to women right!"
"Yeeaaah, girl!"

"He told me that he liked me best when I didn't talk, then said, 'Let's fuck.' He was small, too; why would I want to fuck that? I gave him blue balls instead. Haha selfish bastard."
by pakmafafmr April 08, 2009

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When your girl gets you all worked up but doesnt fisish you off. Makes your balls hurt untill you make yourself (or pay a ho) cream.
Me and my girl were hard at it last night till that bitch blue balled me. But i needed a bicep workout anyway.
by Just another horny teenager March 11, 2009

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The time i scribbled on my balls with a sharpie, that is blue balls.
Me- "MOMMMMMMMM!!!!! I HAVE BLUE BALLS AGAIN!!!"
Mom- "Ill get the turpentine..."
by Capn Ben December 20, 2005

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