E Brain 

A word to describe a really stupid person.

That dude's an E Brain.
Started in 1970 to discribe people that don't use common sense.

E Brain by Scott February 7, 2005

Smooth Brain 

When you underperformed at Magic the Gathering the most skill based game of all time so you convert to Flesh and Blood so you can win coin toss games.

I thought he was a smart guy so I avoided him cause i thought he was an incel but turns out he is a Smooth Brain Dickless Midget so i hooked up with him cause he is much easier to control.

Smooth Brain by Vortakainia August 26, 2021

Monkey Brain 

You nigga

Jennifer has monkey brain

Monkey Brain by nikk1919 December 11, 2019

the brain 

Somewhat like mooning someone but with your penis hanging down.

dont make me have to show you THE BRAINN

the brain by xWildgun March 18, 2003

Car Brain 

A phrase commonly used by urbanists who think choosing to drive means you have a disfunctional brain, and that all drivers are insonsiderste assholes who go 90 across parking lots, randomly swerve into bike lanes, and go out of their way to run over pedestrians in crosswalks... because obviously if you put all the asshole drivers on a bike, bus or train instead, they'd suddenly become more considerate.

Urbanist: I was cycling the other day and almost got hit by some car brain going 30 in a 25. All drivers are assholes. We should ban cars.

Car Brain by car_brain_114 February 27, 2023

Pinky and The Brain 

When your recieving a blowjob, while you narf someone.

She had a fatty, so I convinced her to get down with Pinky and the Brain.

Pinky and The Brain by Doriega February 19, 2008

FG brain rush syndrome 

The feeling that those silly Family Guy fans felt when Family Guy was brought back from cancellation in 2005.

I noticed he got the FG brain rush syndrome ever since it came back in 2005. He has never felt so great since 2002 when the show was in the old series.

FG brain rush syndrome by Seshie February 12, 2009