capron hardy, n. — Green’s Dictionary of Slang

capron hardy n.

[Fr. capron hardi, lit. ‘bold hood’]

an impudent fellow.

c.1460		Bk Curtesye (Oriel MS.) lxvi (1868) 46: To his souereyne Chappron [Caxton capron] hardy no bonet lust avale [OED].
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.