Which dressing is known as "1000"?

Thousand Island Dressing is commonly referred to as "1000" due to its name, which is derived from its origin and recipe that traditionally includes a mixture of ingredients such as mayonnaise, ketchup, and various seasonings. The term "1000" relates directly to the full name, making it easily recognizable by those familiar with the dressing. It is a popular condiment that often accompanies salads, especially in American cuisine, and is frequently used on sandwiches and burgers.

Ketchup, Bleu Cheese Dressing, and Creamy Sherry Mustard are distinct sauces with different flavor profiles and uses, thus not associated with the term "1000." Each has its own unique ingredients and taste, setting them apart from Thousand Island Dressing.