Thompkin 

The act of recieving anal sex from a very large dildo that was found at a public water access boat landing. The act is performed on the man by his woman partner. Usually the dildo itself has come from an unknown origin and considerably unsanitary.

Dude I cant believe Adam let her give him a Thompkin!!! I hope he doesn't get herpes!!!

Thompkin by JoeCapone666 June 9, 2018

thumpkin 

Masterbating while taking a shit

dude my phone fell in the toilet while I was doing the thumpkin

thumpkin by bulwinkle April 11, 2007

Tompkins 

The act of ejaculating into somebodys hair and having it freeze.

Mark totally just gave that chick a tompkins.

Tompkins by Wholeden February 19, 2007

Double Thumpkin

When you stick your thumb in the bumm and the love hole and alternate in and out in and out in and out as fast as you can making a noise like "nenenenene"

Tole threw trash out of the car when I told her not to so I gave her a double thumpkin.

Double Thumpkin by |fn|Gravyfury December 30, 2007

Muddy Thumpkin 

The act of jamming both your thumbs up a someones anus and proceeding to twiddle them around like you are using a game controller.

Person 1: Hey man are you still with your girl?
Person 2: Nah man she broke up with me after I gave her the ole Muddy Thumpkin

Muddy Thumpkin by xXPoonMonsoon69Xx June 3, 2016

Double Thumpkin

Placing the right thumb in the vagina, and the left thumb in the butthole.

My wife moaned and groaned as I gave her a no-lube double thumpkin.

Double Thumpkin by SlimGravy January 16, 2019

Thumpkin 

The act of masturbating while taking a shit.

While sitting on the toilet, waiting for the turd to drop, I took advantage of my alone time and gave myself a thumpkin.

Thumpkin by Davidtavis April 2, 2017