Double Decker Blumpkin 

the act of a male individual shitting or pooping in the upper deck of the toilet while a girl goes down on you (aka; sucking your penis), while she releases poop out of her butthole into the lower deck bowl of the toilet.

Jeff to Randy: Dude, bro, Jerry definitely just got some of that double decker blumpkin action dome piece from that random B with the STDs.
Randy to Jeff: Real nice, real fuckin' nice.

Double Decker Blumpkin by Lambeaux + Jerry March 27, 2009

Double Decker Blumpkin 

When someone is doing an upper decker and the person on the lower decker is is giving head and takeing a shit at the same time.

I walked into two people doing a Double Decker Blumpkin in your bathroom.

Double Decker Blumpkin by sick mo'fo December 9, 2012

Double decker blumpkin 

Takes two people, one takes a dump in the tank of a toilet while the other faces backward on the normal toilet seat dumping while giving the tank dumper head.

Yo, eff those tool bags, they wouldn't give us any beer so Crystal and I pulled a double decker blumpkin in their master bathroom and rolled out! Try flushin that bitches!

Double decker blumpkin by Vern1234 March 9, 2010

double decker reverse pumpkin blumpkin 

To sit on the top of the toilet and take a dump in it, while a girl is sitting backwards on the bottom. She is taking a dump and wearing a pumpkin on her head while giving you dome.

Friend 1: Heather came over and gave me a double decker reverse pumpkin blumpkin on Halloween.
Friend 2: Dam shes notorious for that.

double decker reverse pumpkin blumpkin by jrizzel July 29, 2014

Upper Decker Double Blumpkin 

The act of sitting on the top part of a toilet and shitting while getting head by the girl who is strattling towards you on the bottom seat while also taking a dump at the same time.

The raunchiest act of the famous "blumpkin" to the next extreme calling it the Upper Decker Double Blumpkin.

Upper Decker Double Blumpkin by Dante Rau July 20, 2006

Upper Decker Double Blumpkin 

When a man is taking a dump in the tank of a toilet while a female is sitting on the bowl taking a dump while facing him and performing oral sex on him.

Yo I was taking a shit and Tracy want to give me a blumpkin but she also had to take a shit so we did an Upper Decker Double Blumpkin

Upper Decker Double Blumpkin by Roger Podacter September 19, 2010

kentucky upper decker double blumpkin 

When a man is taking a shit in the toilet tank while a female is sitting on the bowl reverse cowgirl taking a shit and sucking his dick then once they are finished they preform a reverse 69 licking each others assholes clean.

Dude last night i got a kentucky upper decker double blumpkin, and my ass has never been cleaner.

kentucky upper decker double blumpkin by tootalljen89 November 22, 2011