Green’s Dictionary of Slang

1. a transvestite, transsexual or homosexual person.

1936		Gloucester Citizen 26 Oct. 11/4: He-She Wants to Marry. Operation Necessary. [...] ‘I want to be a man,’ declared Koubka, ’I am going to have the operation [...] because I am marrying a girl law student in Prague in 1937’.
1967–8		Baker et al. CUSS 135: He-she An effeminate male.
1979		E. Torres After Hours 188: ‘Where do I come in?’ ‘That’s what the trick said to the he-she.’.
1981		A.K. Shulman On the Stroll 7: The place was full of scum, smelly old hags, detectives, he-shes, perverts.
1991		W.T. Vollmann Whores for Gloria 115: Jimmy said don’t snitch on me boys I’m just a he-she and now let me hide this wig away and go get some ACTION.
2002		J. Lerner You Got Nothing Coming 222: The Bone has also advised me never to stop and talk to a he/she on the yard.
2009		J. Stahl Pain Killers 114: When you make your transition to he-she, or guy-gal, or whatever you call yourselves.
2010		J. Ellroy Hilliker Curse 18: Mike hammer shot the big-dick he/she in cold blood.

2. a ‘masculine’ lesbian.

1972		B. Rodgers Queens’ Vernacular.
1982		Maledicta VI:1+2 (Summer/Winter) 147: From them she might pick up and more to startle than identify with her sisters use words and expressions such as [...] horsewoman (he-she or butch bitch).
1994		L.A. Times Book Rev. 26 June 2/2: This extraordinary story of Jess, a he-she growing up in a blue-collar city in the 1950s .