Green’s Dictionary of Slang

1. homosexuality, thus chichi man, a male homosexual.

1970		San Diego Sailor 70: The wardrobe quean [had] almost decided to pass the good word along to his partners in chi-chi.
2010		C. Cameron Making of a Jamaican Don 102: Batty man, Gays, Chichi man, faggots - in GP In those days in GP there were some serious batty man inside the prison.

2. affectation, pretention.

1935		S. Kingsley Dead End Act I: She is a realist; no chichi, no pretense.
1950		Mademoiselle Jan. 24: Another Chinese delicacy which would add extraordinary chichi to any party is the already famous butterfly shrimp.
1958		E. Dundy Dud Avocado (1960) 91: We’re not having anything to do with this effete chi-chi they’re trying to unload on us now.