A sandwich formed at a fast food restaurant by combining several items. The most common form of a Slop Clock is a the combination of a double cheeseburger, a chicken sandwich and french fries (the sandwich is organized in this order: bun, beef patty, bun, chicken patty, french fries, beef patty and finally a bun).
Justin: "Hey dude, what do you want from (insert fast food restaurant here)?"
Barrett: "Gimme a double cheeseburger, a chicken sandwich and a small fry, I'm making a slop clock!"
Justin: "A what?!"
Barrett: "A slop clock, you'll see!"