"Doing a fish" is to place bets on sports games and or horse racing with the outcome of zero return.
Real late changeover. Reeks of "doing a fish" 🐠 this weekend….. 0/3
by TNBC May 20, 2022
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a phrase used by gay men meaning to fuck or have sex with a female
I asked this dude if he was gay. He was like "HELL YEA! I DON'T DO FISH!"
by LarryBoi January 11, 2009
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A fish sucking you off.

(and yes the fish is indeed gay)
Me: I like Doing Gay With A Fish.

Fish: OK Honey.
by Gay_Fish December 8, 2018
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A phrase to be used in a conversation when there is an awkward silence or nothing to talk about. Similar to "How 'bout them Knicks?"
Zach: Then I found out he crying in the bathroom
Adam: ....
Zach: So do you like fishing?
by 43Sandalwood May 17, 2010
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