Definition of "spavined"

A horse-giver, no more than a horse-seller, has a right to palm his spavined article upon us for good ware. An equivalent is expected in either case; and, with my own good will, I would no more be cheated out of my thanks, than out of my money.

1833, Elia [pseudonym; Charles Lamb], “[Popular Fallacies.] XI. That We Must Not Look a Gift-Horse in the Mouth, […].”, in The Last Essays of Elia. […], London: Edward Moxon, […], page 250

As for the wonderful feats of horsemanship one hears of or sees among the Arabs, they are due to sharp spurs like razors, and to bits strong enough to break an animal's jaw. [...] Their favourite feat at their fantasias or fêtes of suddenly pulling up their horses short while at hand-gallop, ruins their legs, and there is in consequence scarcely a horse to be seen whose hind-legs are not spavined.

1868, Mrs. H. Lloyd Evans, “Across the Atlas”, in Last Winter in Algeria, London: Chapman & Hall, […], page 100

He was mounted on a mangy, shovel-headed horse so spavined that it should have been unable to support his improbable bulk.

2010, Stephen Donaldson, Against All Things Ending: The Last Chronicles of Thomas Covenant, Hachette UK

Now the Bard, glad to get an audience, […]stuck fast with his first Hexameter,Not one of all whose gouty feet would stir.But ere the spavined Dactyls could be spurredInto recitative, in great dismayBoth Cherubim & Seraphim were heardTo murmur loudly through their long array […]

1822, Lord Byron, The Vision of Judgement, stanzas 90-91

The cry, in certain of its essentials not unlike the wail of a soul in torment, rolled out over the valley, and the young man on the seventh tee, from whose lips it had proceeded, observing that the little troupe of spavined octogenarians doddering along the fairway paid no attention whatever, gave his driver a twitch as if he was about to substitute action for words.

1937, P. G. Wodehouse, Lord Emsworth and Others, Overlook, Woodstock, published 2002, page 95