a dirty sanchez is when you have anal sex and then smear the remaining feces onto your partners upper lip, like a mustache.
I tapped some freaky booty last night, she was so freaky she wanted me to give her the dirty sanchez.
by alex August 20, 2004
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1. when one lover smears fecal matter onto the others upper lip (whether it by by way of dick or finger), creating the illusion he has a mustache similar to the mustache your gardener, enrique, grew when he was eight.

2. a theory for what the "that" that meatloaf references in the song where he says hed do anything for love (the other being an alaskan pipeline)

3. an event that occurred in dustin diamonds sex tape. the only time in his life taht he was better than meatloaf.
1:
elsa: damn, look at pedros mustache
luis: no mang, thats no mustache, thats his feces mang.
elsa: DAYUM! he betta wash dat dirty sanchez off

2:
groupie: hey baby, can you rub my poo all over my face?
*meatloaf spontaneously bursts out into song*
groupie: i was wondering what the "that" was
meatloaf: yea, i cant decide if i wrote it about a dirty sanchez or an alaskan pipeline, either way, youre nasty

3:
dustin diamond: wow, im such a loser, my career is dead. im gonna go smear my shit on some chicks face, that will help me!
by DËWadïct March 22, 2008
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Doing a chick, best when doggy style, and at some point during the act of sex...sticking your finger(s) in her ass, and then rubbing that finger(s) on her upper lip, thus giving her a fecal mustache.
"That bitch got pissed when I gave her a dirty sanchez"
by Tommy PWT October 27, 2006
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putting your shit on someone elses lip
he passed out so i put my shit on his lip, you know a dirty sanchez.
by ass bag July 11, 2008
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During anal sex, you pull out and rub your cock across the top lip of your partner. thus giving her a mustache.
Man last night was so crazy, Brittany was begging for the dirty sanchez.
by Sven Ibn Lint Ball February 7, 2009
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An act characterized by the fingering of the ass and the giving of a "thin shit moustache." Not to be confused with the dirty rodruigez.
I was bangin' her ass and then I decided it would be a great idea to give her a dirty sanchez.
by dirty_bird November 21, 2006
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Dirty Sánchez describes the practice, in which the active partner, immediately following ejaculation, inserts the finger into the anus of the passive partner and then smears a mixture of semen and feces under the nose of the passive partner. Eventually, the finger is then licked off by both partners. The naming was chosen, because this was to evoke the impression of a "Mexican moustache."

I gave her a dirty sanchez when I was through.
by Wikipedia83 October 3, 2006
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