The term "junk food" refers to a type of food that is high in calories, sugar, and unhealthy fats but has little nutritional value. This category includes fast foods such as burgers, fries, and sugary drinks, as well as processed snacks like chips, candy, and cookies. Junk food is often convenient and tastes good, making it popular among people who are looking for a quick meal or snack. However, consuming too much junk food can lead to health problems such as obesity, heart disease, and diabetes.