The Big Mac is a type of cheeseburger, a signature sandwich sold by the McDonald’s chain of fast-food restaurants since 1968, made with beef patties, lettuce, cheese, pickles and onion, with a “special sauce” and a sesame seed bun. The Big Mac was invented in Uniontown, Pennsylvania by Jim Delligatti in 1967. Customer response around there was so good that it rolled-out nationally in 1968.
“Two all beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun.” is a trademarked slogan first used by McDonald’s in 1975. The saying has remained popular even though it is not in official use by McDonald’s. Although shown here properly punctuated, it was often spoken rapidly in ads as a single word.