The term "Grinder" dates back to the eastern U.S. during the WWI era. It's said Italian immigrants worked in the shipyards, setting and "grinding" rivets on the huge warships. The lunch of choice was fresh baked super-sized Italian rolls filled with generous amounts of meats, cheeses, and vegetables. When it was lunch time, the supervisor yelled, "Grinders" lunch! Hence, "Grinder," as a meal, was born.