Monkeys, like most other mammals, have a digestive system that processes food and eliminates waste through the rectum. They don't have the physical capacity or biological adaptations to store food there.
Do monkeys store food in their rectum?
No, monkeys do not store food in their rectum. That is a misconception that likely comes from the fact that some animals, like hamsters and squirrels, store food in their cheek pouches.