An overly large sandwich which is at least slightly bigger then the persons mouth that is trying to eat it. As made famous in the 1960's cartoon Scooby-Doo. A Saggy sandwich is made out of anything and everything found in the fridge or pantry. For a sandwich to be considered a shaggy sandwich it must have the following.

1.More than two pieces of bread.
2.Atleast 4 kinds of meat.
3.It must have bacon. Note: Bacon does not count as one of your 4 meats. Bacon is an independent food group within the shaggy snadwich.
4.3 Types of cheese.
5.Atleast 1 Vegetable preferably lettuces or tomato.
6.Atleast 3 Sauces ex.Mustard
5.Something considered Unsandwich like. EX. Cake,brownies, or a doughnut.

If your sandwich has all of these things it can be considered a shaggy sandwich. Congratulations you are among the sandwich making elite.
You:Dude you got any swiss I'm making a shaggy sandwich but, I only have 2 types of cheese.
Friend: Ya it's in the fridge. There is some 3 week old pizza in there too if you want it.
by ShaggyDude June 30, 2008
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A double triple-decker sardine and marshmallow fudge sandwich created by Shaggy Rogers in the Scooby Doo Where Are You episode, "Hassle in the Castle".

The ingredients:
-Loaf bread

-Ham
-Ketchup
-Mustard
-Cheese
-Lettuce
-Sardine
-Marshmallows
-Fudge
-Decorated with an olive

A possible reference that Scooby and Shaggy are pot-heads.
Guy A: What'd you eat back there?
Guy B: A Super Shaggy Sandwich - a double triple-decker sardine and marshmallow fudge sandwich.
Guy A: Damn, you got some serious munchies!
by Overstored Milk October 11, 2014
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