A person of high social status in Japan. One who had access and control over both samurai and shinobi, sometimes in vast numbers. If a daimyo gave an order to one of his samurai or shinobiwarriors, then that warrior must complete that order or commit sepokku (ritualistic suicide performed when one is dishonored)
Did you see that guy? he obeyed every word his girlfriend said! He was even bowing to her! Is she his daimyo or something??"