Green’s Dictionary of Slang

(US) a sex show.

1935		A.J. Pollock Und. Speaks 44/2: Gazoopy, a lewd act.
1939		D. Maurer ‘Prostitutes and Criminal Argots’ in Lang. Und. (1981) 116/1: circus. A sexual exhibition for customers. Also dig, gazupie, show.
1941		G. Legman ‘Lang. of Homosexuality’ Appendix VII in Henry Sex Variants.
1965		Guild Dict. Homosexual Terms 18: gazoopy (n.): Sexual exhibition, commercial. (Rare.).
1972		B. Rodgers Queens’ Vernacular.