Similar to the dirty sanchez, with the horrific modifier being the large quantity of feces that is smeared across the victim's face, leaving them with fecal facial hair similar to the famed woodsman from tv's The Life and Times of Grizzly Adams.
I was going to give Amy the dirty sanchez, but I got carried away and before I knew what happened she was left with the dirty grizzly adams....may the gods forgive me.
A sweet, beautiful woman who comes off innocent ... Only to trap her prey and violate them in the most perverse of ways for her pleasure... Then discarded after being stripped of dignity in the most savage and sexy fashion
*john comes home
Roommate: "have you been crying???"
John: "that date was going great, then she took me home and went Dirty Yvonne on me"
Roommate: "she was so pretty and seemed so innocenttho?"
John: *sobs uncontrollably
A dirty Ryan is when you get any vegetable (as long as you've grown it yourself) and insert it violently into your girlfriends ass whilst simultaneously eating cake from your snacks cupboard.