FAST FOOD STAPLE is a term used to describe the most popular items found in fast food restaurants. The four solutions for this term are COLA (4 letters), BURGERS (7 letters), BURGER (6 letters), and FRIES (5 letters). COLA is a carbonated beverage that is often served with fast food meals. BURGERS and BURGER refer to hamburgers, which are a type of sandwich made with a patty of ground beef, usually served with lettuce, tomato, onion, pickles, and condiments. FRIES are a type of deep-fried potato that is often served as a side dish with fast food meals. All of these items are staples of fast food restaurants.