Green’s Dictionary of Slang

1. (Polari) a homosexual man.

2019

P. Baker Fantabulosa 295/1: minnie a homosexual man.

2. (Polari) a woman.

2023

R. Milward Man-Eating Typewriter 31: A itinerant minny, Madame O feared she might be mistaken for a gypsy [...] so she dolled herself up again.