Spirit in the night...
A Garbage plate is a mound of home fries, a scoop of mac salad, with two burgers (or red hots, white hots, fish, etc) on top. All topped off with their secret meat sauce, and onions and then served with crusty white bread.
The amount of ketchup is up to you. I like a lot. Probably the reason the restaurant has ketchup pumps instead of bottles.