It does not matter how you do it. It's a Fecal Mustache.
Jane likes to give head, but Dick likes to give a Dirty Sanchez.
by S.D.S March 20, 2006
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NO, a Dirty Sanchez is performed when a male fingers a female's ass and wipes the reminants on the female's upper lip. What you referred to below, when a male inserts his penis in a female's ass then transfers the fecal matter from his penis to the female's upper lip is the Dirty Rodruigez, the first cousin of the Dirty Sanchez. Don't feel bad though, they are commonly confused.
The man's index finger was smelly after administering a dirty sanchez.
by UnclePete123 February 27, 2006
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after having anal sex, the man pulls out his penis and wipes it across his partners lip, forming an authentic looking mexican moustache.
he gave her a dirty sanchez and she never had anal sex again.
by frappe August 04, 2005
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When two people are having anal sex and the man takes out his penis and rubs it on the women's lips forming a mexican mustache/moustache. (The growth of hair between the nose and mouth.)
Anal Sex Can Lead to The Dirty Sanchezzz
by Mr.Dirty Sanchez July 19, 2009
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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
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As defined by Kelly Osbourne on the Howard Stern Show, who is an authority on vulgarity coming from the Osbourne family...Dirty Sanchez is a non-sexual practical joke where the offender inserts their index finger into their vagina or butthole then swipes it across the victims upper lip.
My mom was being a bitch so I sneaked up and gave her a Dirty Sanchez.
by Stonewall June 13, 2005
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