Top Definition
To receive a blowjob whilst depositing feces in the upper tank of a toilet.

A combination of a blumpkin and an upper decker.
As vengeance for not being given a tour of my friend's dairy, I enlisted his sister’s help in performing an blumpkin decker in his bathroom.
by porkchopbiscut October 24, 2004

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×