Dahar Master is the title given to Klingons, who are the best of warriors and have reached legendary status. These warriors are respected by all and the tales of their exploits are often repeated in stories, songs and operas. (DS9 episodes: "Blood Oath", "The Sword of Kahless", "Once More Unto the Breach")


The first use of title goes back to the reign of the Emperor Kaldon, who bestowed the honor to Biroq for his martial triumphs. (ST reference: The Klingon Art of War: Ancient Principles of Ruthless Honor)