Poor man, Don Nobody, insignificant person. Does not have a known origin, I once read that the " cat " It was a wallet or bag to carry money, and who it has empty or bare ( " 34 bare Pocket; ) It is a pelagatos, a needy. Although there is a more secure version, which comes from the habit of some beggars or people who by their miserable situation hunting cats ( also pigeons ) to eat, and pull the skin.