For those of us who are usually running around all day, sometimes forget to eat or too busy to eat. Which exactly is not the best thing for your body. You will become cranky, your brain will not function properly, and not mention screwing with your metabolism. Your body realizes it is not getting enough nourishment so it begins storing fat to be consumed later. So as you are not eating to lose weight your body is actually retaining more fat cells. To produce energy, your body will first begin to burn muscle protein. Only when this muscle protein can longer be burned will your body start to burn fat and by then you will have some very serious health problems.
I always have a bag of nuts in my car for those days that I am chaufering around kids.