Dagwood sandwich

noun2

1. •
   (informal) An exceptionally thick sandwich made with numerous layers of various meats, cheeses, vegetables, and condiments.

   • The kind of sandwich he made famous, the Dagwood sandwich, is a hodgepodge of leftovers in the refrigerator all wedged in between two slices of bread. — 1980
2. •
   (figurative) A thick stack of flat objects or a complicated melange of diverse components or ingredients.

   • As one of Groucho Marx's writers told it: an unemployed actor was interrupted at breakfast by his wife carrying a Dagwood sandwich of unpaid bills. — 1956