The term 'Corned Beef Seller' can be summarized as a deli, which is a four-letter word. A deli is a type of store that specializes in selling prepared foods such as sandwiches, salads, and other cold cuts. Corned beef is a type of beef that is cured with salt and spices, and is often served as a sandwich or in salads. Delis are known for their wide selection of meats, cheeses, and other food items, and corned beef is a popular item among deli customers.