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 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

brain stain 

When a man nuts on your forehead.

Hey baby gimme a brain stain.

brain stain by AlecLEE41 July 30, 2022

brainstrain

1-when you are trying so hard to work out something far too complex for your state of mind at the present time that you get a headache.

2-when your so mentally exhausted thinking of minor simple things is a massive effort.

etc.

1-If there was a fence that was like a grid, and the total volume of the fence was 3ft cubed, and the fence was 6 foot tall. if the fence was evenly distributed and a dragonfly measuring 1” height and 4” width, and it could only fly up to 4', what is the probability it will hit the fence, flying straight at the fence, at any given point within the range given.
reading that gave me massive brainstrain

2- what is 5+5+5+5+7+5? too tired, giving me brainstrain

brainstrain by BrAiNsTrAinNN March 28, 2011

Brainstinct 

To follow our brain instead of our heart. To be able to control our feelings and emotions in order to make better choices for ourselves and others around us.

"we should use our brainstinct more often"

Brainstinct by Brainstinct March 26, 2017