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
The real dirty sanchez is when after lovingly cuming in your girl's ass you insert your finger in her pooper and remove cum mix with poop and place it carefully on the upper lip of your loved 1 looking like a well drawn mexican mustache, also known as a "DIRTY PIER" in europe for the resemblance to a french mustache "Pier" and cause they stink, but; almost always welcome when is tastily done.
My girlfriend loves dirty sanchez, but my wife not so much!!

by ferjll October 23, 2007
A Dirty Sanchez is when the man cums in the asshole and then takes the cum out with his finger and makes a mustache on the females face.
They performed a Dirty Sanchez last night
by D. Sanchezzzz October 22, 2007
A poo finger, A finger that has been up some ones ASS that some one wipes across anybodies upper lip.
John was walking home when his friend stopped him and gave him a Dirty Sanchez.Imageine licking your lips and it taste like your best friends ASS.
Its like vanilla Ice cream when your starving for chicken..
by BlahAss October 15, 2007
When you fuck a girl with your penis and draw a mustache on he face.
that cunt sure loves the dirty sanchez
by h3ad5h0t3 September 29, 2007
Ok, this is the official way to give a dirty sanchez people, get it straight. First you must be doing a girl doggy-style, then you stick a finger in her asshole, and reach around to administer the poo-stache.
I told the bitch I'd give her a Dirty Sanchez if she wouldnt shut her trap.
by mengele January 21, 2007
The act of engaging in the doggy style position then fingering the female's anus while in that position and smearing a residue of her own shit accross her upper lip forming a mustache.
*Dan walks up to Mark*

Dan: Hey Mark, you remember that crazy guy on the bus that was masturbating?

Mark: Yeah man, it was fucking sick.

Dan: Yeah, well you wanna know what his name was?

Mark: What?

Dan: Sanchez!

*Dan smears shit over Mark's upper lip, leaving a shit moustache (a dirty sanchez)*
by blahhomies January 10, 2007

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