What is dingle berry?

A dingle berry is a slang term for a small piece of feces that gets caught in anal hair, most often at the end of defecation. Dingle berries can happen to anyone: human, horse, dog, cat.

Dingle berry can also be used as term of stupidity or an insult. As in, "You are as smart as a dingle berry," or "You have the personality of a dingle berry."