A dog. Obscure origines possibly deriving from the propensity of dogs to cheerfully eat their own excrement.

When you eat dirt for the first time and leave your family to build a shack in the woods

An otherwise known smart dog breed, but this particular one is embarrassingly dumb. Eats feces and rocks. Often can be heard barking at nothing. May also be a normally beautiful breed of dog, but has ugly aesthetic features such as; wire coat, beard, Grinch-like feet.