1 definition by Padre03
A celebratory event at the end of the week in which all the participants blackout and drink so much they flop on the ground like a fish. The place where they fish is known as an aquarium. Spin-offs include: Mahi-mahi Monday, Tuna Tuesday, Whale Wednesday, Trout Thursday, Shark Saturday, and Sunfish Sunday.
Joe: Dude it's a Friday, what are our plans?
Kyle: It's Fish Friday, what else would we do.
Joe: Great, I'll grab the beer.
Kyle: It's Fish Friday, what else would we do.
Joe: Great, I'll grab the beer.
by Padre03 February 26, 2021