after having anal sex, the man pulls out his penis and wipes it across his partners lip, forming an authentic looking mexican moustache.

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.)

It is when you rub shit across your upper lip.

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.

all of you are wrong a dirty sanchez is when a man fucks a girl in the ass an then gets a blow job from the girl with shit still on dis dick

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.

The preferred nickname of Oswaldo Sanchez, goalkeeper for the Mexican national soccer team.