The term 'Pastrami Seller' can be summarized as a deli worker. A deli is a store that specializes in selling prepared foods, such as sandwiches, salads, and other cold cuts. The term 'Pastrami Seller' specifically refers to someone who works in a deli and specializes in selling pastrami, a type of cured and smoked beef. This person is responsible for preparing the pastrami, slicing it, and serving it to customers.