When you hear/read something so stupid that it physically pains your brain to understand it.
Chatter 1: your soooo speshul 2 me i dont want to loose u

Chatter 2: owwwww my head, that was fucking brainful to read
by TheNilla June 25, 2009
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The act of giving oral sex, or a blowjob.

The word is usually used by ganstas.
Bob: I heard you got a new girl?

Maxwell: YAH! Last night she was braining me!

Bob: Like I need to know...
by IKnowIt203 July 22, 2009
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VERB: To have someone else's hairy balls shoved in your face unexpectedly. When they are shoved in your face, the balls and tightly gripped to resemble the look of a human brain. Penis should be hidden in the process so that the balls are the only thing that are shown.
Guy 1: "Dude, i just got brained in the face like no other. Guess what I did"
Guy 2: "What?"
Guy 1: "I licked 'em!"
by ringo the ratatata January 22, 2008
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The act of squeezing your ballsack to form or what looks like a brain.
Bill: Jeez did that man just flash his nutsack.

Johnny:No you jackass he braining us.
by Blueswan August 27, 2015
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Them sluts on da corner are gettin brain
by D March 16, 2005
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A hefty chunk of muscle & tissue that, over time, accumulation in your cranium. A large percentage of a certain anonymous school lacks this potentially deadly weapon called a brain. Brains come in many different shapes and colours but below is a short factual story about a boy, with a brain too big for his own good.

The master of all that is brain and over lord of his palace of coolitude is a extravagant individual of pure intelligence. His servants, Adam, Ben & Adrian residing forever by his side kept well under cover the true capability of his brain. His rough, pale skin and constant hyperventilation does not reflect the many ways in which this personality can be described in a word… cool. In the year 1990 a red headed woman, her energetic daughter and her specialized hairdressing other half, entered a substantially well built hospital in southern Mansfield just past the border to Sutton-in-Ashfield. As the family entered the ward a tense atmosphere rose as an abundance of collected ward nurses dropped their clipboards and dashed towards the struggling woman. They entered the theatre. A few hours after, exiting through two large main doors of the childbirth wing, immerged a family of 4. Thus a new era of righteousness was upon us. A new way of life was about to become reality. A path in which we could all follow was clearing. It was the birth of Shane.
XXX- Look its Shane.
YYY- Goddamn hes so... intelectual. I can almost feel his brains working from here.
XXX- Should we ask home about homework?
YYY- YOU CANT JUST WALK UP TO SHANE AND TALK TO HIM! Look theres Adam. We'll ask him to talk to shane for us.
by TOMMEE June 2, 2006
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Brain is the ultimate blowj*b, the type that gives one a brain freeze and make your toes curl. mostly performed by females that are very experience in oral sex.
dang! that girl gave me brain, u can tell she went to a good school.
by Dr. High December 24, 2007
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