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Brain aids. when a person is being so stupid it is like they have aids in their brain.
1. Dude I think I have braids. I didnt know my girlfriend was a tranny.
Braids by shredmeister310 November 21, 2011

Fuck Brain 

Someone who never uses common sense, like engineers and people who just don't get life.
A board is cut 1/8" short and their micromiter mind says it's off. You kindly reply "It's a house not a hydrolic pump FUCK BRAIN !

You screwed his girl friend, of course he's pissed, FUCK BRAIN !
Fuck Brain by unomee May 17, 2006
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!
brain by Brainiac! June 9, 2007
to give someone a blow-job
brain by seres August 31, 2005

Brain Storm 

When a man ejaculates while he has his genitals in "The Brain" position.
Brain Storm by RNb March 27, 2009
When you're attracted to somebody primarily based on their personality and mind rather than appearance (although that does help).
"That thing you just said was so cute. I have an erection for you, but in my mind. I have a brainer."
Brainer by bobplate May 5, 2014