A Fi Fi is a thing that inmates use to self masturbate just like a pocket pussy. It's made out of a toilet paper roll and a latex glove and to make it have moisture you use grease shampoo shaving cream or something of that sort and to make it tighter and loser you use rubberband.
by DaddyPayne August 25, 2019
Get the FiFimug. 
by Milovuk September 12, 2023
Get the fifi the foxmug. 
Rubber glove, preferably not used, usually lubed inside a tube sock for deep release especially in jail.
by Deepration April 10, 2023
Get the Fifi sockmug. by kannacouldbeatgoku October 6, 2021
Get the Fifimug.