Foot fishing 

When you're foot fisting and your prosthetic foot falls off and you try to fish it out.

"Dude, last night Jessica got down and dirty and I lost my foot in her anus, I had to go foot fishing"

Foot fishing by the soggiest bread November 16, 2015

foot fisting 

Verb: fütt fisting
Forcibly inserting one's foot into the anus or vagina of another.

Hey baby I just got a pedicure, now I wanna foot fist you!
Now get ready for the foot fisting of your life!

foot fisting by Weezerlungs December 2, 2013