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

Street Brain

The act of getting your dome waxed while driving.

After the keg ran out I totally got some Street Brain driving this drunk bitch back to her place.

by NBA Jam Rules Bro April 03, 2009

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

cum-for-brains

A horny, promiscuous woman of low intelligence.

That slut Jill is good in bed, but she's got cum-for-brains if she thinks that I'm going to marry her.

by ESB43 May 16, 2018

mayo brain

A person who is just an absolute idiot.

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

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

Brain burn

When a person sees an event or an image that is so horrible they will never be able to forget it.

I walked in on my parents having sex and got instant brain burn!

by Rmc0315 December 26, 2011