A blowjob that is so forceful that the penis may penetrate the giver's brain. This forcefulness is most likely due to a) a large penis b) an aggressive thrusting motion c) the ramming or pushing down of the head with a hand d) any combination of the above factors.

You got Brained!
I want to Brain her!
by Brainiac! May 23, 2007
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an exclamation loudly expressed while one plays shooting videogames and deals a headshot to another player.
*player one shoots player two in the head and kills him*

"OOH! BRAIN, SON! BRAAAAINN!!!"
by excel excel excel March 12, 2009
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Brain

1. noun: marijuana

Brained

2. adjective: to be heavily under the influence of marijuana. stoned or wasted.
"Bro, I've just finished torrenting the new Lost episode. I need to score some brain."

"I can't answer the door. I'm way too brained."

"That movie is fuckin awesome on a brain."
by brayne September 28, 2006
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Brain is NOT another word for head like many people seem to think, but rather the art of a girl sucking and massaging the male testes with her mouth and tongue.
i have never had the fortune of recieving brain, but i hear it is quite the superb experience.
by Phenom Jackson October 28, 2007
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In Britain to brain someone is to beat them up; to smash out their brains!
Just let me know before I go and brain Louise with a baseball bat.
by sweeeeeeeeeet June 22, 2010
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verb: to manipulate another person using ones intellect and wit. aka to mindfuck someone

past tense: (brained) to be outsmarted

noun: (brain) the master plan

also short for "brainwash"
"She took you for all your chips? Man, she brained you, sucka."

"He's so smooth, he's the master of the brain."

"BRAIN!" (in recognition of a clever plan)
by torpedoheat September 22, 2007
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