乃だい公こうalso: おれだいこうMeanings1pronounI; memale term, language, or namedated termDated, rough, arrogant male first-person pronoun. Used to assert dominance or in a self-important manner. Not used in modern polite conversation.乃だい公こうが相あい手てになってやろう。I'll take you on.乃だい公こうの言いうことを聞きけ。Listen to what I say.