What is "addlepates"

Usage examples of "addlepates".

But then that howling pack of addlepates, the Fitz Geralds, trooped into Corcaigh and, cozening Ser Timoteo with a need to invest Righ Sean as ri or chief of Fitz Gerald, managed to get the poor bastard to themselves long enough to murder him, then roused the townsfolk, somehow won to them the Ifriqan mercenary cavalry, and first attacked the royal palace, which was defended by the condotta of di Bolgia, then poured out of the city and threw themselves at what was by then left of my besiegers.