when u take ur balls and squeeze them together to make them look like a brain
i told the teacher too look around then i flashed her the brain
by gilli-spree September 26, 2007
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when you take one of your nuts and flash it through the hole in the front of your boxers. resembling a brain.
i gave mikey the worst brain...he was scarred for life.
by Scoot m. September 9, 2006
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1. referring to the act of giving "head"

2. also referring to an attractive woman, or one who you'd like to receive brain from.
"Yo Ant, your sister totally gave me some steaming hot brain last night."

"Daaaaamn, that female is quite brain, and I do believe I would enjoy sticking my penis within her speaking hole."
by Rob Engle August 29, 2005
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Verb:
- To smash the skull of
- To hit or bang (someone) on the head.
I thought about studying, but decided to brain myself instead.

That guy called my mother a whore, so I had him brained.
by Joe Odell April 16, 2008
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A casual blowjob - better known as Cashj Beej
"This skank hooked up some brain last night - I knew she was down for cashj beej."
by bTreezy November 10, 2006
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Referenced in the movie 'Waiting. . .' it is the isolation of one's ball sack by squeezing the ball sack at its base and making it puff out thus resembling the shape of the human brain.
Just to see his reaction, I shot Brian a flash of my brain! That fucking meat gazer seemed to enjoy it!
by Amato75 May 24, 2006
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simple... another word for head. suck it or not?
"chillin like a scarecrow lookin for some brain"
-lil wayne
by flipperrrr June 17, 2007
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