A sandwich created by the desperation and creativity of Stoner munchies, not necessarily requiring any traditional sandwich makings which is made by combining anything at hand in between two pieces of a bready outer layer.
Taco Bell/Dominos Stoner Sandwich: Crushed Doritos
and hot sauce in a $2 Chicken Burrito between two slices of pizza, preferably with two toppings.
Friend: Dude, what is that?
Stoner: I call it the Chicken Burrito Pizza Sandwich.