Noun: An extra piece of food that you
cook with no intention of consumption for the current meal, but with
knowledge of the fact that you will be
hungry again shortly after. (Also applicable to intentionally ordering extra food at a restaurant in order to fulfill the same purpose)
Jack: Why are you
cooking four hamburgers for dinner John? I told you that Kim couldn't come and it would just be the three of us for
dinner!
John: Dude relax, I'm just making some auxiliary food! You know I'm gonna be
hungry again later.