super double blumpkin 

the act of receiving a blow job while taking a shit in the top of the toilet (know as an upper decker). at the same time the girl is reverse straddling the toilet seat, sucking your cock, while taking a shit.

Guy: "Hey I have to take a shit."
Girl: "So do I!"
Guy: "Want to give me a super double blumpkin?"
Girl: "Hell yes, let's go."

Guy: "I could really go for a super double blumpkin right now."
Girl: "Isn't that kind of gross?"
Guy: "Trust me, you will enjoy it."

Girl: "Hey, do you want me to give you a super double blumpkin right now?"
Guy: "Of course I do!"

super double blumpkin by Five-StarFratStar August 25, 2011

imaginary blumpkin 

The act being aroused and then masturbaiting while taking a lovely crap. Most people imagine a blow job while they are doing this act.

Landon would sit on the toilet for hours giving himself an imaginary blumpkin after his breakup with jackie.

imaginary blumpkin by insanesexybeast February 19, 2011

blundonian blumpkin 

A gay sex act performed in a public restroom lacking partitions between stalls, in which two seated participants take turns bending over sideways to perform fellatio on one another whilst simultaneously defecating in their respective receptacles. Generally not performed sequentially ("I'll do you until you blow out both your loads then you do me, ok?") but rather in rapid alternating bursts of a few seconds duration A-does-B then B-does-A. A professionally-executed blundonian blumpkin maneuver results in a virtually seamless and volcanic four-way explosion and is a true wonder to behold.

Conversation in public restroom:

Gay Guy #1: Are you thinking what I'm thinking?

Gay Guy #2: Blundonian blumpkin?

Gay Guy #1: Ha!

blundonian blumpkin by Chad Wooley March 4, 2006

hyper blumpkin 

A blumpkin that involves diarrhea. Could lead to a chili dog.

After Taco Bell, I love a good hyper blumpkin.

hyper blumpkin by Caexar January 8, 2007

mudder blumpkin 

While orally pleasuring a women from behind, you proceed to mudder boat her while she shits all over your face

It took me two showers to clean my face from last nights mudder blumpkin

mudder blumpkin by Flumpkin Bucker October 23, 2009

rumble blumpkin 

A rumble blumpkin is the same as a blumpkin (getting a blowjob while taking a shit) except the recipient has explosive diarrhea.

I wanted to get a blumpkin from your sister after dinner, but we ate Taco Bell and it turned into rumble blumpkin instead.

rumble blumpkin by chuck-fucking-norris December 18, 2011

Smashing Blumpkin 

After receiving a Blumpkin (fellatio while defecating on the toilet), proceeding to place the lucky lady's head on the seat and smashing the lid on her.

I had the worst blumpkin ever. She didn't even swallow the goop. I had to make it a smashing blumpkin to remind her to take her protein next time.

Smashing Blumpkin by Tim Branberries January 31, 2008