'Orgullosamente' means proud, while the 'Yucaterco' is a play on Yucateco and 'Terco' (stubborn). So if you have a proudly stubborn Yucatecan on your list of wierd friends that you want to buy a tshirt for, or if you ARE one, then this is the shirt for you. The idea for this shirt came from Don Carlos Medina Hadad, who laughed off the term Orgullosamente Yucateco and substituted the Yucaterco.