Reaming a chick from behind (doggy-style) and then rimming her asshole with your finger with which you run it (fecal matter and all) under her nose as to make a moustache with.
My bitch was pissed when I gave her a dirty sanchez last night.
by D Sanchez April 30, 2003
Get the Dirty Sanchez (Der-ti San- chez) mug.