Definition of "coxy"

He's the coxiest young blackguard in the house—I always told you so.

1857, [Thomas Hughes], “The War of Independence”, in Tom Brown’s School Days. […], Cambridge, Cambridgeshire: Macmillan & Co., part I, page 202

[H]e "couldn't abide a fellow who thought he made himself fine by being coxy to 's betters."

1859, George Eliot [pseudonym; Mary Ann Evans], “Links”, in Adam Bede […], volume I, Edinburgh, London: William Blackwood and Sons, book first, page 305

"Thou coxy, cackling candle!" said Catweazle. "Why dost thou titter?"

1971, Richard Carpenter, Catweazle and the Magic Zodiac, Harmondsworth: Puffin Books, page 70

Now your laying birds, too, can have protection against cecal coccidiosis. AMPROL* SOLUTION can be safely given to all chickens at the first sign of coxy or when a diagnosis of coccidiosis has been made.

1967, Canadian Poultry Review, volume 91, page 6