This is the act of placing one's penis into the female's anal cavity and then proceeding to take your penis (which is then covered in the female's feces) out of the female's anus and then placing it into her mouth and giving it a cheeky twirl.
Boy: "Yo bitch, you want dat dirty washing machine don't ya?"
Girl: "Oh hell yeah you dirty cunt"
by Big Cam April 28, 2017
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A sex move that is like no other. I, Carwash7576, am inventing a sex move. Kinda like a gang bang, but not really. There has to be 3 people there, at least 2 males. One male on the left side, one male on the right side, and they both jerk off at the same time in a speed test, and the third person is waiting for them to orgasm while doing their own thing. When the 2 males are about to orgasm, the third person runs in the middle, and gets a “dirty car wash” the person running in the middle, has to go back and forth between sucking on the dicks after the initial carwash. When the 3rd person is sucking on the dick, the other dick goes inside. It ends by putting your clothes on, walking out, and acting like it never happened. After the dirty car wash takes place, it’s never spoken of again, and you will never be the same. Ever.
Girl one: “Ew. Why do you smell so bad?”
Girl two: “I’m not really supposed to talk about it, but I did a Dirty Car Wash with Kyle and Chad.”
Girl one: “Oh shit. No wonder you smell like fish.”
Girl two: “What the fuck? The Dirty Car Wash is the best thing i’ve ever done!”
Random girl: “The fucking what?”
by carwash7576 January 11, 2020
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The act of a woman using her her ass cheeks to stimulate an erection and seeing it through completion on her lower Lombard region.

Origin: old Norse/cleveland
That girl gave me the best dirty car wash south of the Mason-Dixon.
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As you're sticking your dick in a girl, you pull out right before you cum and squirt a bottle of Listerine up her cunt and then cum on her teeth, just because.
"So I was going down on this girl, and she had a really smelly pussy, so I had to give her a dirty mouth wash."
by Shameless M April 2, 2010
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When a man curtsy flushes after diarrheaing in a toilet, the toilet water splashes the penis head and leaves fragments of poop on the penis.
*flush*

Man 1: Ah What the fuck?

Man 2: Ha ha sounds like you got a dirty south wiener wash!
by Novacaine86 May 8, 2010
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when you piss in a persons mouth then put your dick in there
man: hay kid get in my van and i will give you a dirty mouth wash

kid:no thanks my dad sied if i let no one touch my pikle he will give me a nikle

man: pulls out gun

kid: oh shit
by ting ling 69 April 8, 2022
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When you have anal sex with your girl in a bath tub full of water
Last Latoya let me stick it in her ass, too bad i had to dirty wash
by pupscorprhino October 16, 2015
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