A submarine sandwich, also known as a hoagie, hero, grinder, or sub, is a type of sandwich that typically consists of a long roll or baguette filled with a variety of meats, cheeses, vegetables, and sauces. In some regions of the United States, it may also be referred to as a po'boy or torpedo sandwich. Regardless of the name, submarine sandwiches are a popular meal option for people on the go or those looking for a filling sandwich to satisfy their hunger. Whether you call it a sub, hoagie, or hero, this classic sandwich always hits the spot.