A sandwich served on a long roll of bread, typically six inches to several feet in length, filled with a variety of ingredients, usually some combination of meat, cheese, and vegetables. Often shortened to "sub" or "sub sandwich," and known by different names in different regions, such as "hoagie" and "hero." This restaurant across the road from our office makes the best submarine sandwich in the city.
See also: submarine
1. and sub and hoagy and torpedo and grinder and poor boy and hero n. a long sandwich containing many different foods. (Sometimes many feet long. It is cut into smaller segments for serving a group. Usually contains sliced meats and cheese, as well as tomatoes and onions. Terms vary depending on where you are in the country.) He ordered a submarine, but he couldn’t finish it.
2. n. a large marijuana cigarette. Look at the size of that sub!
3. n. [menstrual] tampon. My God! I’m out of submarines!