The latest term in foodland is something you'd least expect if you wanted to sell your sandwiches. But, it seems to be working. The ingredient on many cutting edge sandwiches is 'debris'. Debris means means the bits and pieces left behind from roast beef or pork or even chicken I'd wager. Most especially those cuts off meat which are smoked and pulled apart or sliced thin. The bark may be part of the debris.
Seems to have originated at Mother's Restaurant in New Orleans and has now spread to sandwich making kings everywhere.