daddyEnglishOxford Dictionary of Englishdaddy /ˈdadi / ▸ noun (plural daddies) informal one's father. ▪ the oldest, best, or biggest example of something: the daddy of all potholes. ▪ (the daddy) the best or most successful person: it's you who's calling the shots now—you're the daddy. – ORIGIN early 16th century: from dad + -y2.