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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!
buttfish by The Clat November 25, 2010
Words you can keep
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"
Buttfish by JasuukRahk March 29, 2011
Another term for a bowel movement.
I dropped a massive buttfish after eating all those Krystal's.
buttfish by Leah Baker November 29, 2006
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?"
buttfish by Half a Rainbow December 14, 2022
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".
Buttfish by bair March 18, 2008
Noun. A buttfish is a marine creature which is shaped like an ass.
dory: maybe if I just find a buttfish
marlin: you cant find a buttfish!
Buttfish by doryspeakswhale April 15, 2020

tropical buttfish 

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."
More from Urban Dictionary
(Ewokese) Freedom!
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!
yub nub by rotjrem November 4, 2010
Word of the Day on September 4, 2026
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