Slang for caveman-
As a result of evolution, cows grew from generation to generation and developed the likeness of the homosapians we know today as the human race. The term cow refers back to our original form.
See that cave painting over there? It was drawn 3000 years ago by a cow. They were hunter-gatherers and they often killed animals for food, and one of these cows decided to depict it so their image could live on forever.
moo moomoo moo moo moo moomoo
Translation: The people keep eating us, It's disgusting!
Cow 1: Moo moo moo moo moomoo
Cow 2: Moo moo moomoo moo