When a person is upper decking a toilet and another person is shitting backwards on said toilet giving oral sex to the person doing the upper decking.
by Coltnasty August 19, 2021

The receiving of oral pleasure whilst taking a particularly sticky, post-bourbon, dump.
Also known as the B-James.
Also known as the B-James.
Hey Jim, I finished a 10-pack of JD's last night. Any chance I can get that Brown sugar blumpkin you owe me?
by doot_toot April 19, 2017

When the person who just received a blumpkin puts their arm elbow deep in the toilet and then closelines the person who just gave them the blumpkin.
Ben was enraged that Kristie used her teeth when he climaxed on the can so he immediatly gave her a blumpkin forearm shiver to let her know who's boss.
by C Floods July 7, 2006

The fine European art of performing the Glass Bottom Blumpkin includes 2 females, 1 male, and a roll of stick or non-stick saran wrap. The male receives a ravaging blow job from one female, whilst the other female, laying on her backside with her dome piece saran wrapped (stick or non-stick), places her face strategically under the male's external anal sphincter. As the male approaches the ultimate climax, he sprays his doo doo butter on the second females saran wrapped dome piece.
At a social event, Nathan explains to Hari last night's turn of events.
(Hari): Yo man what happened with those two bitches last night? Jill looked all disturbed this morning.
(Nathan): OH YEAH! That bitch and her friend gave me a Glass Bottom Blumpkin last night!
(Hari): NO WAY!
(Nathan): Yeah man, I put saran wrap on Jill's face and she laid down under my asshole, then, Pam gave me an amazing blow job while i shat immaculately on Jill's head.
(Hari):....
(Hari): Yo man what happened with those two bitches last night? Jill looked all disturbed this morning.
(Nathan): OH YEAH! That bitch and her friend gave me a Glass Bottom Blumpkin last night!
(Hari): NO WAY!
(Nathan): Yeah man, I put saran wrap on Jill's face and she laid down under my asshole, then, Pam gave me an amazing blow job while i shat immaculately on Jill's head.
(Hari):....
by Hari and Nathan September 6, 2007

A blumpkin involving two men, where the person defecating (shitting) is also the one fellatiating (giving a blowjob)
John: Nice bathroom, isn't it?
Mark: Wanna Reverse Brother Blumpkin?
John: Reverse what?
Mark: You need to go on Urbandictionary.com, shut the fuck up and suck my dick.
Mark: Wanna Reverse Brother Blumpkin?
John: Reverse what?
Mark: You need to go on Urbandictionary.com, shut the fuck up and suck my dick.
by J-Sl1ce October 5, 2008

A variation of the "Roman Spider Dump" mixed with a "Double Blumpkin." Two males face each other on the toilette while taking a dump, a third person hangs from the top of the stall like Spiderman and preforms oral sex on the other two. This act is most commonly performed in the washrooms of Mellon Arena between periods.
Star: "That chick sitting in front of us is disgusting and her crazy husband thinks the Leafs are offside every time they cross the blue line."
Murk: "Dude, I think I saw them and the usher preforming a Pittsburgh Spider Blumpkin before the third period in the can!!"
Murk: "Dude, I think I saw them and the usher preforming a Pittsburgh Spider Blumpkin before the third period in the can!!"
by lance tightpants December 29, 2009

More formally known as a DDB, it is closely related to the wrestling term DDP. This is a sexual maneuver involving two partners. The partner receiving the bumpkin will hold the ejaculated cum in their mouth after the other is finished. The receiver of the blumpkin, dressed in torn up jeans and a cut off tee-shirt, will then give their cum filled partner a diamond cutter in the middle of the bathroom. This will hopefully send the ejaculated sperm on another journey through the air onto the bathroom floor and walls. This move should be done with care, and the winner can qualify for the intercontinental championship of the world.
by Squire September 4, 2008
