NPC's with zero personality and originality so anytime they are confronted with a creative choice. ei; What color should I do my hair? How should I decorate my room? What tattoo should I get? They immediately hop on Pinterest or google images in a desperate attempt searching for something to copy that they can hopefully pull off as a "unique" part of their quirky style or whatever.
I saw some boomers in the tattoo studio just looking for pics online they could have the dude copy for them, fucking pinterest brain man.
by Fawzx August 30, 2019

When someone who listens to Phish has become so brain dead that all they can think about are the Phish lyrics that knocked 80 points off their IQ. These people also do not know how to dress and rarely shower or groom themselves.
I can tell by the dumb look and blank stare at that that dude has Phish brain. There’s nothing going on up there.
by HappyCamper919 June 20, 2024

"I don't know, I'm having such a headache today" - "Headache???? What's a headache???? Don't you mean brain pain?!!!"
by itsbrainpainbitch April 2, 2022

When someone acts so stupid, it’s like they have a lack of brain cells in their heads.
People with BCDS typically post nonsense on Twitter and Reddit, and think the moon landing was faked.
People with BCDS typically post nonsense on Twitter and Reddit, and think the moon landing was faked.
Conspiracy theorist: the earth is flat!
Me: the earth is round, dude, you’re suffering from a case of Brain Cell Deficiency Syndrome.
Me: the earth is round, dude, you’re suffering from a case of Brain Cell Deficiency Syndrome.
by GeosWorld April 23, 2023

Emem: Yoo that nigga Matthew lit the J yesterday with the filter still in his mouth.
Felix: Bruh mans def got that Gorilla Brain.
Philos: Broo you never tried smoking like that though?!
Felix: Bruh mans def got that Gorilla Brain.
Philos: Broo you never tried smoking like that though?!
by northerntitties February 20, 2022

someone who only lives on past knowledge and doesn't understand the new things that have been made for this world and resides to the older version of things. Continuing to live by things in the past
Old brain, "You write with your right hand not with your left when writing." Based on how writing with your left hand in the past was seen as abnormal and creepy while writing with your right hand was seen as the norm
by Red.kin April 4, 2021

by jamundertoast July 18, 2016
