A.C. Slater-Upper Decker Blumpkin 

When a man defecates in the top tank of the toilet while receiving oral sex from someone pooping and sitting backwards on the seat.

"Hey girl, my dick is real hard and I noticed that we are both have been farting a lot. Perhaps we should A.C. Slater-Upper Decker Blumpkin"

A.C. Slater-Upper Decker Blumpkin by Juan Perico March 8, 2009

THE UPPER DECKER 

The upper decker is when you shit in the tank of the toilet.

Man.. Tom is being a dick! I'm going to give him the upper decker before we bail!

THE UPPER DECKER by BigL830 August 18, 2017

Hipster Upper Decker 

The act of defecating in the upper tank of a toilet, exhaling vape into the tank and then sealing it for a honeydew, kiwi, and cool mint surprise!

Thomas left a hipster upper decker in the toilet at the party that was surprisingly refreshing.

Hipster Upper Decker by GiantsMartyr January 20, 2018

Super Upper Decker Deluxe 

The act of taking a Shit on the top cover of the tank of the toilet

Nick: Yo man i just took a Shit on Deans Toilet

RoseMarry: Yo you just Super Upper Decker Deluxe His Ass

Super Upper Decker Deluxe by Dusty Dean July 28, 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

British Upper Decker 

To poop on the floor on the top level of a double decker bus.

Someone was in the first level bathroom so Becky pulled a British Upper Decker.

British Upper Decker by @catfur June 28, 2012

Spartan Upper Decker 

When one is frustrated and angered to the point of giving the accused a most-deserved upper decker and feels the need to voice their anger- they must, just before dropping a lung in the toilet tank, shout loudly- "This is Sparta!!!" as spoken in the movie 300. After this is spoken, one would shit with vengeance into the tank.

Angry person- That bitch of a waitress ignored our table for over half-an-hour because they add automatic gratuity to the check, so I will leave them my opinion of their service in their toilet tank in the form of a Spartan Upper Decker.

Friend 5 minutes later- Did you do it?

Angry person- I showed no mercy!

Spartan Upper Decker by Litaker April 25, 2011