When a person that has been on "Smart for Life" or another one of those "cookie diets" is so hungry and upset at not being able to eat regular food that they are extremely touchy, volatile and potentially violent. Liable to snap at the slightest provocation.
Dude1: Hey, should i ask Anthony if it would be O.K. to...
Dude2: Whoa! You want him to Cookie Rage on you! Keep your mouth shut and ask him next week when he is eating regular food!