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The act of shoving your hand up another's anus and tickling their insides while yelling "fisty biscuit!"
"Dude, my girlfriend wanted me to fist her last night, so I gave her a fisty biscuit!"

"I shoved my hand up this kid's asshole, then pulled it out and called it a fisty biscuit"
by John Hecklmeyer (Myth) November 27, 2013
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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