Definitions by Julio Montano

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