The emptiness you feel in your stomach in the middle of the night, usually while watching commercials for pizza or Burger King.
> Guy #1: Hey what did you do last night?
> Guy #2: Ughh man, I was watching this movie on TV, and then a Burger King commercial came on for the Whopper JR. I realized I totally had the midnight munchies and I just had to get 50 of them things.
