Brain in the Whip 

when a man receives oral sex when he is operating a motor vehicle; to get head while driving

Murph paid a stripper $100 to give him brain in the whip on the way home from the club.

Brain in the Whip by Johnny O April 7, 2004

brain laundry 

Those likely to become brainwashed.

David Koresh had a full load of brain laundry.

brain laundry by The one and only Bill Davis February 23, 2008

Braincest 

In certain circumstances, two children will be born, sometimes even from different parents, and they will be siamese. However, not siamese physically, but mentally. If such children with siamese brains partake in any physical activities, it is called braincest.

Kathy and Jake are getting married? That's braincest!

Braincest by Josh Osborn May 23, 2008

Brain skeet 

A good idea

- what should i put on the urban dictionary.....
- Brain skeet
- I should put the word brain skeet

Brain skeet by A little bit Cooler December 9, 2008

Blue Brain 

A condition similar to Blue Balls. When none of the ladies you're currently dealing with are intellectually stimulating, you have Blue Brain.

Yeah, I dated Paris Hilton for awhile. The sex was hot, but I had blue brain the entire time. Packed up my shit and left that ho. Bought the booty tape though. Good shit.

Blue Brain by Muzak August 1, 2009

Man Brain 

When a woman thinks and acts like a man but is very feminine.

"Damn Dude, She has a Man Brain, She's perfect."
She drinks beers, does shots of whiskey, shoots guns, plays video games.
She's the type of woman that every guy wants and dreams about.

Man Brain by Quertie February 7, 2015

Small brain 

When someone is a small brain they are not smart and have the smallest of brain's. People with small brain typically are named Roger and Bo.

Roger has small brain.

Small brain by WhyAPenny November 1, 2019