Green’s Dictionary of Slang

1. (orig. US black) the buttocks; ext. as fig. ref. to oneself.

1923		E. O’Neill Hairy Ape Act V: Gee, pipe de heinie on dat one! Say, youse, yuh look like de stoin of a ferryboat.
1928		R. Fisher Walls Of Jericho 33: ‘Hyeh’s yo’ chance, man – start out as my agent.’ ‘Agent yo’ hiney’. [Ibid.] 149: Once they see you slippin’, it’s yo’ hiney from then on – they’ll put d’ locks on you and throw d’ key away.
1948		in G. Legman Limerick (1953) 133: Said the famous composer, R. Strauss / When asked why he buggered a mouse : / ‘Though its cunt is quite tiny / On occasion its heiny / Will stretch quite as big as a house’.
1956		L. Hughes Simply Heavenly I iv: I can’t lay on my hine.
1958		(con. 1950) E. Frankel Band of Brothers 13: When you hear the last good ole / Semper Fi, we’ll have to knock / These fellers on their hi-neys!
1978		L. Kramer Faggots 78: You are not getting even a little heinie!
1978		R. De Christoforo Grease 156: ‘No hinie biting!’ Kenickie yelled.
1988		D. Woodrell Muscle for the Wing 131: He went up fast and low, his fat heinie bouncing with each step of his short legs.
1992		B. Gifford Night People 67: For fifty [i.e. dollars] you can [...] do me up the heinie.
2000		T. Udo Vatican Bloodbath 37: Why don’t y’all just drop your pants and come on over here and park that cute heiney on mah big stiff rod and staff?
2005		J. Stahl I, Fatty 43: I tore his wife’s innards coming hiney-first into Kansas.
2007		J. Stahl ‘Pure’ in Love Without 165: Be careful with the heinie, darlin’.

2. (US campus) a woman, considered sexually.

1977

Eble Campus Sl. Fall 3: get some heinie – to go out on a date; to pick up a date. ‘I’m going to get some heinie tonight!’.

3. (US campus) a handsome man.

1977

Eble Campus Sl. Fall 3: heinie – a good-looking male.