jerumpkin

The act of practicing for a blumpkin by jerking yourself off while taking a dump.

I tried to give myself a jerumpkin as practice before my girl gave me a blumpkin.

by Antler* February 28, 2008

jerumpkin shrapnel

A poop stain on the back of the terlet(toilet)seat that is left after sitting too far back while performing a jerumpkin.

After finishing a very satisfying jerumpkin, I got up turned around and noticed jerumpkin shrapnel on the terlet seat.

by Antler* February 29, 2008

Jumpkin

Much like a blumpkin where you get blowy while dropping off a SEAL team, its when you jack off and take a shit at the same time because you're stuck in some third world shithole or... your parents house.

dude 1 walks into the bathroom
dude 1: hey man, hows it going? you've been in here a minute.

dude 2: it was going good until you interrupted my jumpkin

by 9223-beotch April 3, 2013

Doodle-jumpkin

to receive a blumpkin while playing the game Doodle jump

no one has ever gotten a doodle-jumpkin

by the man the myth the maker July 20, 2010

jerumpkano

The splash of terlet water on your balls or ass because of forceful dumping while giving yourself a jerumpkin. Similiar to a blumpkano.

Note: Degrees of splash are important. If water hits your balls, ass and taint it's a category 3 jerumpkano.

The category 3 jerumpkano caused me to evacuate the terlet seat as I was unable to concentrate on finishing the jerumpkin.

by Antler* February 29, 2008

Jumpkin

The act of making yourself cum while simultaneously dropping a deuce.

My girlfriend wouldnt give me a blumpkin because apparently she hates the smell of my deuce, so I went into the bathroom and gave myself a jumpkin.

by usmc_nightmare March 25, 2010

jumpkin

Jacking off while fingering your butthole, with the result being intense sexual pleasure.

After Pat's underwear were frozen, he sat in his room and gave himself a jumpkin.

by jackinit April 3, 2005