brain strain 

something that causes your brain to hurt..over stressing your brain

OMG that biology test gave me a major brain strain

brain strain by blaisey mcg December 9, 2008

[New Strain Brain]

When one tries a new weed (marijuana) batch/strain for the first few times, one is usually more inebriated than usual so you feel more wasted than usual. Folks might act more erratic or unlike themselves.

Friend 1: Hey man you b trippin everytime you come over here!
Friend 2: That's cuz I always be having new strain brain trying out some of your trees and gettin extra funkin high you observant motherfucker!

[New Strain Brain] by Shitheel Lane June 5, 2015

Brain stain 

Information now in your head that you don’t want to be there.

Caitlyn Jenner’s performance on The Masked Singer left a brain stain.

Brain stain by La Vraie Princesse January 17, 2023

Brain Stain 

When something is stuck in your head, typically a song or tune/beat, that just won't go away like a bad stain.
See also "Ear Worm"

I've got brain stain from that song on the TV advert, I can't get it out of my head and I don't know the artist!

Brain Stain by oretisktick October 25, 2023

Brain Stain 

The act of holding your testicles in your hand, so that they resemble a brain. Then placing them on someone, thus giving them a brain stain.

I totally brain stained Johnny last night in his sleep.

Brain Stain by ClitorisCommander1234 June 7, 2011

Brain Sprain 

A temporary condition usually caused by a blow to the head, or the consumption of too much Alcohol, resulting in the inability to remember a Goddamn thing.

" Dude, I had such a Brain Sprain last night, that I forgot everything! "

Brain Sprain by BtotheRtotheItotheAtotheN September 20, 2012

brain stain 

the pesky mess left after someone's brain has splattered; usually left on purpose, out of anger and frustration

I'm so pissed at you, there's gonna be brain stains all over your shit when you get home!

brain stain by alyjane November 22, 2011