Brain Fish 

Someone who is really smart but lacks wisdom.

He is a rare species of brain fish, floating around his bowl thinking about important theories but he'll never able to actually apply any of it.

Brain Fish by Peaceful_Idiot April 27, 2011

Gold fish brain

Alyssa Leah Portillo

Damn nigga you have a gold fish brain.

Gold fish brain by Tmnt344 February 11, 2020

Fish Brain 

When You pull your balls out and put them in your hand under your shirt, then ask people if they are interested in seeing a fishbrain before exposing yourself

Jock"Hey dude, you wana see a fish brain?"
other guy "Sure"
Jock "Take a good look."
other guy "aww thats gross man"

Fish Brain by Julio Montano May 16, 2006

Fish brain 

For the fish named people whos brain acts like a goldish when it comes to memory or general listening.

Brodie you got that fish brain going on right now

Fish brain by ThePlatformerAU December 26, 2023

Brian Fisher 

A huge shit on a 100 dollar bill which is then given to a fast food drive thru teller in exchange for food.

Drivin tru a drive thru, you then hand a brian fisher to the lady, most likely you will have the cops called

Brian Fisher by Mr. MIKE LOWRY July 8, 2009

Brainfish 

A large species of fish that explodes into millions of little brainfish in order to reproduce.

Also a term for a fish that thinks they know it all.

God, that guppy is such a brainfish!

Brainfish by NovaMetatail July 7, 2009

Brainfish 

When someone shares less than half IQ of a goldfish, making them a brainfish.

Tew: Yo we're lowkey so dumb
Nia: Yeah we share the same amount of braincells as a brainfish
Tew: The fuck you mean brainfish?
Nia: I MEAN GOLDFISH
Kunai: Yall niggas slow

Brainfish by Not at all kunai July 9, 2025