A fork of Rural Dictionary
Having very short term memory.
From 50s Britannia Episode 1: Rock 'n' Roll Britannia. "They (UK record executives) were very much geared towards making records the either were going to appeal to an adult audience and, therefore, might have a slightly longer shelf life, or were going to appeal to young people, who were notoriously fish-brained and they would forget something within two minutes..."
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"
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.
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