I'm going without eating for most of the day then binge on the most unhealthy food and over-eat to the point of discomfort.
Do you starve and binge on a regular basis? Is there something driving you to do that?
It's not a big deal, sometimes I just do things like that
It is a very unhealthy habit to train your body to starve and binge. It would be better to eat healthy portions throughout the day so your body gets the nutrition you need.
It's not hard to say no to food. I do it for fun sometimes.
This kind of behavior sounds a bit like bulimia or EDNOS. You should get professional help before it controls your life.