Definition & Meaning of "fag stag"in English

What is the origin of the term "fag stag" and how is it used?

Fag stag is a slang term that appeared in late 20th-century English, mainly in North American gay communities, to describe a heterosexual man who enjoys spending time with gay men. It is modeled on "fag hag", with "stag" replacing "hag" to signal masculinity. While less common than "fag hag," the term can be used playfully or affectionately within queer circles, but it can still carry a teasing or slightly mocking tone. Outside of LGBTQ+ or familiar contexts, it may be confusing or feel patronizing.