Definition of Dagwood sandwich:
(n) :
(informal) An exceptionally thick sandwich made with numerous layers of various meats, cheeses, vegetables, and condiments.
(n) :
(figuratively, by extension) A thick stack of flat objects or a complicated melange of diverse components or ingredients.
(n) :
Alternative form of Dagwood sandwich. [(informal) An exceptionally thick sandwich made with numerous layers of various meats, cheeses, vegetables, and condiments.]