junk food
1. Food that lacks actual nutritional value. No wonder you're hungry again—you only ate junk food earlier.
2. By extension, anything that is appealing but seems to have little discernable value or benefit. Your brain is going to rot if you keep watching junk food like these stupid reality shows.
junk food
Prepackaged snack food that is high in calories but low in nutritional value; also, anything attractive but negligible in value. For example, Nell loves potato chips and other junk food, or When I'm sick in bed I often resort to TV soap operas and similar junk food. [c. 1970]
junk food
n. food that is typically high in fats and salt and low in nutritional value; food from a fast-food restaurant. Junk food tastes good no matter how greasy it is.