Green’s Dictionary of Slang

1. a homosexual who is equally happy in active or passive sex roles.

1935		A.J. Pollock Und. Speaks.
1960		L. Bruce ‘Father Flotsky’s Triumph’ [recording] Kiki, you nafka, you!
1970		J.P. Stanley ‘Homosexual Sl.’ in AS XLV:1/2 52: The term kiki [...] on the east coast [...] refers to an individual who functions sexually either as a passive partner or as an aggressor.

2. a bisexual.

1966		Trimble 5000 Adult Sex Words and Phrases.
1970		J.P. Stanley ‘Homosexual Sl.’ in AS XLV:1/2 52: The term kiki is defined on the west coast as ‘bisexual’.

3. a lesbian who takes neither an overtly feminine nor masculine role.

1947		in Katz Gay/Lesbian Almanac (1983) 626: In New York [...] the expression [i.e. for a lesbian who switches gender roles] is ‘ki-ki,’ but no-one elsewhere seems to be familiar with this peculiar term.
1964		V. Taylor Journey to Fulfilment n.p.: Peg laughed. ‘I’m kiki. I can be either, depending on who I’m with. Comes in handy sometimes’.
1982		Maledicta VI:1+2 (Summer/Winter) 132: Ki-ki (lesbian who goes either way).
1993		(con. 1960s) Kennedy & Davies Boots of Leather (2014) 213: ‘Yeah, they called them neither-nor, ki-ki. You find that now too, double role playing’.
1998		R. Scott Rebecca’s Dict. of Queer Sl. 🌐 kiki — in the days when butch/femme ruled in the [lesbian] bars, this was a derogatory term for someone who was neither butch nor femme.

4. a male homosexual who engages in oral and genital sex simultaneously.

1965

K. Worthy Homosexual Generation Ch. xvi: Kiki: A male homosexual who indulges in the oral and genital homosexual method at the same time. Most of the fags like the rectal method best and prefer to be the receiver.

5. (also kaki, kyky) sexual intercourse between two homosexual men of the same ‘type’, ie passive and passive or active and active.

1965		Guild Dict. Homosexual Terms 26: ki-ki (adj.): (Pronounced with each ‘I’ long.) A homosexual who desires sexual relations exclusively with homosexuals of his own type and proclivity.
1972		B. Rodgers Queens’ Vernacular 121: kaki [kyky] lovemaking between two homosexuals, both of the same type, ie plug with plug and socket with socket.