Green’s Dictionary of Slang

the foot, or the foot and ankle; usu. in pl.; thus curby hocks n., round or clumsy feet.

1785		Grose Classical Dict. of the Vulgar Tongue.
1796		Grose Classical Dict. of the Vulgar Tongue (3rd edn) n.p.: Hocks. vulgar appellation for the feet. You have left the marks of your dirty hocks on my clean stairs; a frequent complaint from a mop squeezer to a footman.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1841		J. Mills Old Eng. Gentleman (1847) 294: If a man is down upon his hocks, he requires more stimulants, than if he was going it cheerily on his daisy-trimmers.
1885		Bulletin (Sydney) 21 Mar. 5/1: All you want now is a lintseed poultice on your hock and a bowl of gruel with a wooden spoon, to be declared ‘evidently’ the inheritor of the high qualities of the noblest of the Browns.
1900		Sporting Times 20 Jan. 2/2: I’ve got a welting man on / My blooming back, and, oh! my hocks!
1929		A.J. Barr Let Tomorrow Come 42: I’m sleeping on the hocks in that blind. [Ibid.] 147: Sit down an’ rest your hocks.
1934		Z.N. Hurston Jonah’s Gourd Vine (1995) 42: Drop dem britches below yo’ hocks, and git down on yo’ knees.
1949		H. Miller Sexus (1969) 374: A pair of every kind hanging by the hocks.
1957		D. Niland Call Me When the Cross Turns Over (1958) 199: In the end he was blood from head to hocks and all over the place like a mad woman’s custard.
1966		B. Jackson Get Your Ass in the Water (1974) 158: She had long curly locks and big fine hocks, / a lovely leg to caress and hold.