Joanie loves Chachi so much that she gave him a Blumperdecker the other day in a rundown truck stop bathroom because they had nothing better to do.
by Dico Brohey February 23, 2010
The act of receiving a blumpkin while taking a shit in the back part of the toilet or otherwise known as an upper decker. For the desired effect you must ejaculate into the toilet bowl and leave unflushed semen in the toilet. Someone will see the semen and procede to flush it unaware that the toilet bowl will now be filled with shit. Its a perfect mash-up of the blumpkin and upper decker
My roomates wouldnt stop leaving the toilet unflushed full of piss so I left them a very surpising blumperdecker
by mypimppony May 03, 2015
When one person shits in the water tank, preferably onto the ballcock, while receiving oral sex from a partner who is sitting on the toilet, AC Slater style, also taking a shit.
So I went to leave an Upper Decker in Bill's toilet, but Mary came in and offered to give me a Double Blumperdecker since she had to shit, too.
by Tarzanello April 01, 2015