A sexual act where in a man shits in his partner's mouth and then fucks their mouth.
She's the type of freak who would pay for a coyote sandwich.
A coyote sandwich is a used, rolled and tied sanitary napkin thrown into a public restroom trashcan. It is often eaten by wild animals that get into the trash cans or by desperate homeless people starved for protein.
My friend Pete used to work for the forestry service and he had to clean coyote sandwiches out of the trash.