Do intestines grow longer from regular overeating or what makes a gluttons belly so huge?

Overeating does not cause the intestines to grow longer. The size of the stomach can increase in response to regular overeating, but the intestines do not lengthen.

A glutton's belly, also known as abdominal obesity or central obesity, is caused by excess fat accumulation in the abdominal area. This can be due to genetics, diet, lifestyle factors, and certain medical conditions. It is not directly caused by overeating, but is associated with the consumption of excessive calories and a sedentary lifestyle. The belly appears large due to the excessive fat deposit around the abdomen rather than the stretching or enlargement of the intestines.