Thousand island dressing is ketchup and mayonnaise.
Marie Rose sauce is ketchup and mayonnaise.
Fry sauce is ketchup and mayonnaise.
Burger sauce (including Big Mac sauce) is ketchup and mayonnaise...
@nprofile1q... There's an apocryphal(?) story of a diner who got a bit mixed up and asked for "Three Mile Island Dressing". They were brought a bottle of Thousand Island Dressing and a bottle of Tabasco.