Quarter Meat Sauce

I believe you are referring to a dish called "Quarter Pounder with Cheese" that is served in many fast food restaurants in the United States, particularly at McDonald's. Although it may be referred to informally as "quarter meat sauce," the dish actually consists of a cooked beef patty (weighing a quarter of a pound before cooking), a slice of cheese, lettuce, onions, pickles, and special sauce, served on a sesame seed bun. It is a popular menu item and is often customized with various toppings and condiments according to personal preference.