Low-fiber/low-residue diet
A low-residue diet is a diet which aims to reduce the amount of residue, which is the indigestible material remaining in the large intestine after digestion of food. Since this residue contributes to fecal bulking, a low-residue diet in theory reduces the quantity of feces and frequency of defecation.
Source: Wikipedia — Low-fiber/low-residue diet (CC BY-SA 4.0)