When you haven't eaten a meal, or eaten for a while, you crave whatever is put in front of you, and moving onto your refrigerator and pantry.
Person 1: Dude, I had such a bad food adrenaline rush yesterday.
Person 2: Wow, how much did you eat? Like a whole horse?
The sudden euphoria and onset of chemical reactions that occur when one eats food while malnourished.
Having not eaten in days, Les Stroud was gifted with a sudden food rush while eating a protein bar portion in the forest.