Food you would not make (cook) for someone who is just a friend. When you make this food for someone you want to fuck them.
Beth: He made me sushi becuase my back hurt.
Friend: Dude did you fuck him?
Beth: No! It was just a friend thing.
Friend: No fucking way! He served you fuck food!
Beth: What are talking about?
Friend: Sushi is not a friend food. He went through the effort to make Sushi....meaning he wanted a piece of ASS!