DIRTPIPE 

The first six inches or so of your anal cavity, commonly used during anal intercourse.

To run up in someone's dirtpipe. Can also be used when reffering to deficating; as in "I have to go clean out the old dirtpipe."

DIRTPIPE by JonDpm July 25, 2006

dirtpipe milkshake 

When having unprotected anal sex, upon male ejaculation into the recipient's rectum, an anus-stretched situation may occur that results in the semen dripping out of the rectum. This is known as a dirtpipe milkshake, aka anal creampie.

Alternately, if the recipient wants to, they can squeeze out the semen on command, resulting in a dirtpipe milkshake on demand.

dirtpipe = rectum
milkshake = semen

I spl00ged up in her ass and the bitch gave my sheets a dirtpipe milkshake.

dirtpipe milkshake by Nube June 11, 2006

dirtpipe milkshake 

A sexual act involving anal sex in which one person ejaculates into another's rectum. That person then proceeds to pass the semen back out of their anus and then eats it.

"She just had a dirtpipe milkshake."

dirtpipe milkshake by jl;kjl;jk May 18, 2008

dirtpipe boomerang 

When two people push their assholes together and alternately shit into the others asshole, hence boomerang.

Invented by Bill Cosby in 1956.

See also ultimate dirtpipe boomerang showdown

Kevin:"What are you watching?"
Bill:"Two black trannys doing a dirtpipe boomerang."
Kevin:"Pass the KY jelly"

dirtpipe boomerang by TheChode April 8, 2007

dirtpipe diva 

An adult actress that specializes in anal films...

So Allison and I went back to my place last night, she is a total dirtpipe diva...

dirtpipe diva by dirty harry 71 November 14, 2013

dirt pipe milkshake 

To give a person a dirt pipe milkshake, you would cumin that person ass hole and have them spirt it, and then watch them drink the cum that has come out of there ass.

Billy: "Jane can I cum in your mouth when we fuck?"
Jane: "Hell no! Cum in my ass and then i drink it.I love a dirt pipe milkshake"
Billy:"That sound like you realy want a dirt pipe milkeshake to me."

dirt pipe milkshake by Little Jonny May 4, 2006

Oreo Dirtpie 

The act of splitting an oreo cookie in half, wiping the cream part on one's rectum, and having another party proceed to lick the cream off.

The definition of this word evolved from other words involving pastries with sexual relations, specifically rimjobs.

Dude last night was so awesome because after I bought a brand new bag of oreos Jessica gave me an oreo dirtpie.

Oreo Dirtpie by Streetgang September 23, 2009