brain erection

When you have a large problem, and you're stuck because you cannot figure out the answer. In which case the only thing to do is think about or preoccupy yourself with something else, and let your brain erection go limp so that you can go back to the problem in a fresh state of mind.
You: I've been working for hours and can't figure out this homework! It's too difficult, why would they give us something that's impossible to learn?

Friend: Dude chill out you just have a massive brain erection. It needs to go limp, just go play with your pet squirrel for a bit.

(Later)

You: Hey this homework makes sense now!
by roboticsnail August 06, 2011
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Rat Brains

When a man squeezes his balls so that the scrotum bunches up slightly and takes on the appearance, shape, and texture of brains.
Carl pulled his balls out and showed everyone his rat brains.
by Crabkilla2001 January 16, 2009
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Gerber brain

a girl who is especially naive to the ways of the world. a simpleton.
That gerber brain idiot just spilt her drink on my lap.
by P Nutty May 11, 2009
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Brain Slurp

This is a common word to explain when a male massages the scalp of a female that he is attracted to or friends with. This method is usually only done with one hand and executed in a social gathering.
Tim: Dude that girl is so hot

Bob: Yeah, shes always looking for a good Brain Slurp

Tim: Fuck i got so much crap on my hands. Maybe some other time
by Petersouris Rex April 19, 2010
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mayo brain

carson is such a mayo brain. he just bought his vape an hour ago and just lost it at lunch
by sammyc April 24, 2017
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crystal brain

noun

1. a keen mind, formidable intellect

2. that which an intelligent person uses to predict future events instead of a "crystal ball"

This term was coined by comedian Adam Carolla on his morning radio show to combat a harpy lawyer who was insisting that she couldn't possibly predict what an obvious outcome would be because she didn't have a crystal ball.
Reasonable Person: That new Sandler movie is gonna blow ass.

Douchebag: You don't know that. You don't have a crystal ball.

Reasonable Person: I don't need a crystal ball; I have a crystal brain.
by ContusorOssis November 06, 2012
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brain on drugs

Yo, waiter! Can I get a brain on drugs over here?
by ~*~Rachel~*~ March 06, 2008
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