A grinder is a type of sandwich similiar to the sub or hoagie. Here's an explanation from wikipedia for you:

A submarine sandwich, also known as a hero, hoagie, grinder, sub, Italian sandwich, po' boy, wedge, zep, or torpedo, is a popular Italian American sandwich that consists of an oblong roll, often of Italian or French bread, split lengthwise, and filled with various meats, cheeses, vegetables, spices, and sauces. [1][2] The sandwich has no apparent generic name, and major US cities have their own names for it.[1] The usage of the several terms varies regionally but not in any pattern, as they have been used variously by the people and enterprises who make and sell them. The terms submarine and sub are widespread and not assignable to any certain region, though many of the localized terms are clustered in the northeast United States, where the most Italian Americans live.




I don't need any refreshments at the moment, but I will send some of those good thoughts to Barney boy as well.