Deceptive Eating

the action of eating an amount of food in order to reduce the amount one has to eat in order to trick one into thinking they are not over-eating or (informal) a slob; especially when the food eaten to deceive is not particularly enjoyable

Person 1: "I poured a lot of chips on my plate so I ate a bunch so that people didn't think there was that much."
Person 2: "Nobody likes deceptive eating, man. That is unhealthy."