fast food

Short definition from Wiktionary

Noun

1. 1
   Food that is served quickly, often standardized and pre-prepared.
2. 2
   A type of food that is quickly made, but of low nutritional value; junk food.
3. 3
   Anything standardized, quickly available, and inexpensive, often, of low value.
4. 4
   Rare form of fast food.

Adjective

1. 1
   Of, pertaining to, or serving fast food.