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"
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!
by oretisktick October 25, 2023
Get the Brain Stainmug. 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.
by ClitorisCommander1234 June 7, 2011
Get the Brain Stainmug. by La Vraie Princesse January 17, 2023
Get the Brain stainmug. the pesky mess left after someone's brain has splattered; usually left on purpose, out of anger and frustration
by alyjane November 22, 2011
Get the brain stainmug. When a man nuts on your forehead.
by AlecLEE41 July 30, 2022
Get the brain stainmug.