Green’s Dictionary of Slang

a male homosexual.

1954		(con. 1940s) T.A.G. Hungerford Sowers of the Wind 145: Likes his vice versa [...] I always thought he was a bit of a horse’s hoof!
1960		J. Franklyn Dict. of Rhy. Sl.
1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 105: To think of a bloke with a moustache bein’ a horse’s hoof.
1968		J. Alard He who Shoots Last 129: Dat’s da wing where dey got all da horses hoofs and da pork and beans. Ya sees, da queers is all penned up together.
1980		Barltrop & Wolveridge Muvver Tongue 81: Today ‘poof’ is used, and Cockneys have a rhyming slang verson of it: ‘horse’s hoof’.
1986		C. Bowles G’DAY 46: Better watch it — doan wannim turnin inter an orse’s oof.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Horse’s hoof. A homosexual. Rhyming slang for poof, ie poofter.
2001		(con. 1945–6) P. Doyle Devil’s Jump (2008) 163: Eddie Worrall was Lil? Edddie Worrall and Mick Toohey — a pair of horses?
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 90/2: horse’s hoof n. a homosexual.
2002		‘Gay Men Names’ The-House-of-Love.org 🌐 hoop-stretcher • horse’s hoof • huckle • hula-raider.
2011		ntnews.com.au 21 Mar. [Internet So a bloke walks into an outback pub, orders a c**k-sucking cowboy and then someone calls him a poof. Well it might have been a horse’s hoof or a wolly woofter.