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..."
by sfemet September 30, 2013
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"
other guy "Sure"
Jock "Take a good look."
other guy "aww thats gross man"
by Julio Montano May 8, 2006
Damn nigga you have a gold fish brain.
by Tmnt344 February 11, 2020