1 definition by Brainiac!

Top Definition
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 22, 2007

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