Ketchup or catsup is a table condiment with a sweet and sour flavor. The unmodified term now typically refers to tomato ketchup, although early recipes used egg whites, mushrooms, oysters, grapes, mussels, or walnuts, among other ingredients
Mayonnaise, colloquially referred to as "mayo", is a thick, cold, and creamy sauce commonly used on sandwiches, hamburgers, composed salads, and French fries. It also forms the base for various other sauces, such as tartar sauce, fry sauce, remoulade, salsa golf, and rouille.