Lardosis

Incapacity having eaten a large quantity of food, noted to be particularly severe if the food was particularly high in fat content.

Lardosis occurs when an overweight person attempts to straighten themselves up and tuck in their stomach fat. This is done in an attempt to look respectable or hide their condition.

You may commonly find this in people trying to lose weight, people in positions of power who feel the need to look imposing, or simply people who also have an overweight ego.