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

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

Thumpkin 

A more powerful blumpkin; a blumpkin with 'a little more umph.' A quickly and fiercely delivered blumpkin, often resulting in massive amounts of shit water and semen splatter with heavy collateral.

1. So my girl sat me down on the john and we proceeded to experiment with a blumpkin. It went downhill from there and I ended up getting more of a thumpkin than anything else. By the end of it, us and the whole god-damned bathroom was covered in shit and cum.

2. Yeaup, so I pressured Lisa into giving me a blumpkin the other day... bad idea. Instead I got a massive thumpkin that blew out the lights and shattered my mirror. The toilet's fucked too.

Thumpkin by mcautistic April 6, 2013

thumpkin 

Recieving head while taking a shit

My high school lacrosse coach told us of the thumpkin his girlfriend gave him.

thumpkin by Exit30six November 24, 2003

thumpkin 

one who is being a ass

dum thumpkin

thumpkin by Monkey Man April 7, 2003

thumpkin 

when somebody gives a man a blowjob while playing call of duty.

Yo, yesterday i was playing cod and my girlfriend gave me a thumpkin

thumpkin by The Tuck March 18, 2011

Thumpkin 

Close relative to the Blumpkin; The act of masturbating while taking a poop. Ass must remain unwiped.

After taking a Bludumdump, I figured I'd give myself a Thumpkin. Two for one wipe special

Thumpkin by Thumpman March 5, 2021