It featured mild salami, provolone, thinly sliced onions and peppers, tomatoes, olives, with a small amount of olive oil on a submarine sandwich roll.
en.wikipedia.org The noted sandwich connoisseur was also given a six-foot submarine sandwich.
sports.abs-cbn.com It specializes in submarine sandwiches (subs) and salads, but it is most famous for its frozen fruit drinks, officially called eegee's drinks but colloquially known simply as an eegee's.
en.wikipedia.org So apparently, it can extend to things other than the terminology for submarine sandwiches.
www.npr.org Baguettes, either relatively short single-serving size or cut from a longer loaf, are very often used for sandwiches, usually of the submarine sandwich type, but also panini.
en.wikipedia.org