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.

Mayochup is ketchup and mayonnaise.

Salsa golf, an Argentinian sauce invented at a golf club, is ketchup and mayonnaise.

French cocktail sauce is ketchup and mayonnaise

Japanese aurora sauce is ketchup and mayonnaise

The basic building blocks of the Universe are ketchup and mayonnaise.