1 definition by John Hecklmeyer (Myth)
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"
"I shoved my hand up this kid's asshole, then pulled it out and called it a fisty biscuit"
by John Hecklmeyer (Myth) November 28, 2013