Today is National Eat a Hoagie Day. Here are some things you may not have known about the sandwiches. “Hoagie” is a term used mainly in the Philadelphia region for a submarine sandwich. Regionally in the U.S., they’re also known as heroes, grinders, torpedoes, wedges, zeppelins, spuckies, blimpies, bombers, Italians, and spiedies. The origin of…