A hot dog is a grilled, steamed, or boiled sausage served in the slit of a partially sliced bun.

Hot dog preparation and condiments vary worldwide. Common condiments include mustard, ketchup, relish, onions, and cheese.

These types of sausages were imported from Germany and became popular in the United States.

The hot dog became a popular street food in the U.S. and is closely tied to baseball culture.