Because I've never had it, and friends are in town and someone on the plane recommended they go to Mothers to get it, and I had just told them to avoid the place lol.
I think I have an idea of what it is, like the remnants of cooking a roast beef, right? Scraps of meat, gravy more or less?
But do you get as something "with" a po boy? Like "I'd like a Roast Beef Po Boy with debris" or is it a sandwich of its own, like "I'd like a debris po boy please".