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!
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.
10π 44π
Information now in your head that you donβt want to be there.
Caitlyn Jennerβs performance on The Masked Singer left a 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!
4π 28π