Green’s Dictionary of Slang

Miss Thing n.

also Miss One, Miss Thang, Ms Thing

1. [1960s+] (orig. US gay) a homosexual man, also as greeting between such men.

2. [1970s+] (US gay) one’s innate femininity.

3. [1980s+] (UK black/campus) any unnamed woman.

4. [1990s+] (US black) a woman who is seen as arrogant and unpleasant.