Definitions by Ann_Archy

Upper decker

Taking a shit in the top part or tank of the toilet.

He pissed me off so I did a upper decker in his bathroom.

Upper decker by Ann_Archy September 12, 2018

Dirty fish tank 

When a female gets oral sex while taking a dump in the upper tank of a toilet.

It’s like a female blumpkin mixed with an upper decker.

Sara gave me a blumpkin last week. I returned the favor by hooking her up with a dirty fish tank in the restroom at the mall.

Dirty fish tank by Ann_Archy September 11, 2018