The act of quickly sliding a hand between a persons butt cheeks and then briefly wiggling the hand in a fish-like manner.
My friend was bending over so I gave her a buttfish.
As I walked by the guy in the bar I buttfished him.
Hey jerk, quit buttfishing me!
by The Clat November 23, 2010
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I dropped a massive buttfish after eating all those Krystal's.
by Leah Baker November 30, 2006
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A specialized version of the chess analysis engine Stockfish, designed to transmit the best moves discretely through one's butt.
"Oh yeah, he was definitely using buttfish. Notice how he squirmed before promoting his H pawn?"
by Half a Rainbow December 14, 2022
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A legendary picture of a man having a fish shoved up his butt and exposing it on a camera to the internet for all to see.

Used by many courageous fleet commanders in EVE Online to demoralise the enemy in local channels, especially when trolling or smack talking needs to be done.
EVE FC in local system chat : "Hey guys look at our epic kill <posts buttfish link disguised as killboard link>"
Everyone else in chat: "Oh god what the fuck is that shit? I am petitioning this, you disgusting piece of shit, why don't you post something normal like alabama hotpockets or something"
by JasuukRahk March 13, 2011
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Noun: One who is stupid, foolish, or overly annoying. (Compare to acting like an ass)

Not limited to people. But not applicable to objects.
1) "Descartes was such a buttfish."

2) "Stop poking me, buttfish".
by bair March 18, 2008
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Any number of poolboys, cabana boys, lifeguards, etc. who work in or around water and whose sexual orientations range from ambiguous to flamboyantly homosexual.
"All these tropical buttfish are deflating my sails."
or
"He's a total tropical buttfish. He hit on Mrs. Windham's son last night at the luau."
by Henry G. Jordasche April 13, 2007
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