Almost the same thing as the Dirty Sanchez, The Dirty Snachez is when you are having anal sex and pull out and put your penis back in her vagina. The thrusting creates residual poo to build up around her vagina.
by Mudvayne559 February 16, 2009
It's actually called a dirty sanchez, and it is performed when the male sticks his finger up the chicks ass and uses the crap to give her a moustache
by Sam Childs July 23, 2003