Fast food is the term for a kind of food that people eat from a restaurant where food is prepared and served quickly. There are many different kinds of fast food, but among the most popular are hamburgers, cheeseburgers and French fries (chips).
The restaurants that sell fast food are called "fast food shops" or "fast food restaurants". Some of the more common fast food restaurants are McDonald's, Wendy's, Burger King, Taco Bell, and KFC.
When a lot of fast food is eaten, it can cause health problems and complications, such as high cholesterol, clogged arteries, diabetes, obesity, and death.