Its when you wipe your ass after a particularly filthy dump and you get a shit stain your thumb knuckle.
I was pleased to finally get the key to the executive wash room, however Stan Phillips was not pleases to see that I had a shit stained thumb knuckle when I shook his hand at the share holder meeting.
by jim dandyy June 13, 2011

by Daniel ShaggyDog November 16, 2006

by kraiden December 9, 2017

by Britt Charnock March 6, 2017

Insert three fingers anally, slightly past the middle knuckles; then bend the fingers and lift violently.
When I caught the whore going through my wallet; I gave her a three knuckle hook job on one end, grabbed her hair with the other hand and threw her ass outta the hotel room.
by NoFnNamesLeft June 9, 2009

by Greg Haun February 14, 2019

by LaughingCrow May 25, 2018
