No, Fast food is not heathy. In fact, fast-food is the opposite of heathy.

Fast food is tasty because of the combination of flavor and mostly smell. The smell triggers your taste buds to enhance your taste.

Fast food is called fast food because, like in its name, it is served and prepared fast. Most fast-food companies can finish preparing and severed in under 10 minutes.

No, because the definition of fast food is that it is served to you fast and the definition of junk food is that it is junk/unhealthy for you. Keep in mind that some fast-food aren't unheathy and some junk food isn't fast.