1 definition by Bellabwaha
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.
Laura: Oh no, he's a Fishco!
Karissa: Oh... I thought that was normal.
by Bellabwaha November 7, 2010