Green’s Dictionary of Slang

an impudent fellow.

c.1460		Bk Curtesye (Oriel MS.) lxvi (1868) 46: Wynter and somer to his souereyne / Capron hardy no bonet lyste to auak.
c.1561		Awdeley Fraternitye of Vacabondes in Viles & Furnivall (1907) 12: This knave with his cap on his head lyke Capon hardy, wyll syt downe by his Maister.