A submarine sandwich, commonly known as a sub, hoagie, hero, Italian, grinder, wedge, or a spuckie, is a type of American cold or hot sandwich made from a cylindrical bread roll split lengthwise and filled with meats, cheeses, vegetables, and condiments. It has many different names.
The terms submarine and sub are widespread in the US and not assignable to any certain part, though many of the localized terms are clustered in the northeastern United States.