Sonic brain

To infer that someone's cognitive function is on the lower end of the spectrum by alluding to "Sped". Sonic is widely regarded as a very speedy character and sonic is an attempt to play on the word sped. Attaching Sonic to the brain means sped brain for lack of a better phrase.

*Plays game*
John: "Kill him, he is one shot."
Bob: *Misses every shot*
John: Do you have sonic brain?

by Pogopawee March 19, 2021

Brain Case

noun. the human skull or head

Cory slipped and broke open his brain case all over my kitchen.

by Big Poppa Frost October 11, 2007

Drop Brain

“Dropping” or showing your nutsack “brain” in a casual manner to prank or surprise others.

I decided to drop brain to prank my roommate, but then his girlfriend came through the door and things got awkward.

by Small Jerry June 14, 2018

Tattoo Brain

The utter lack of any brain power or ability to think straight after a long tattoo.

After being tattooed, Jane was unable to count her cash due to a case of tattoo brain.

by Inkybynature October 13, 2018

binge brain

When your brain becomes mush in the middle of a streaming binge.

I suffered from binge brain after six straight episodes of “Russian Doll”

by MA Delerium March 2, 2019

Calculator Brain

Somebody who can do complex math equations in their brain in a matter of seconds.

Person 1: What is 356x751?
Person 2: Uhhhhhhhh
Person 3: 267356
Person 1: What a calculator brain.

by skmad1212 June 28, 2013

Rock brain

When you brain is as useful as a rock.

Man, after hitting that blunt I got mad rock brain.

by Gwilz November 5, 2018