Top Definition
a magical, wonderful place, where belligerent freshman athletes mate on wednesday nights. and lose their jackets.
"what are you doing this wednesday?"
"going to fishco, obvi..."
by brownvolleyball May 16, 2008
1 more definition
Boyfriends that cheat on their girlfriends with nasty bitches and catch a repulsive infection that makes their penis smell like fish. Thus, the male being called Fishco.
Sarah: Dude, my boyfriends dick smells like fish...
Laura: Oh no, he's a Fishco!

Karissa: Oh... I thought that was normal.
by Bellabwaha November 06, 2010

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