To me a fag hag is a not just a girl who has gay friends. She is a girl who thinks guys having sex together is hot and prefers all her male friends to be gay (and, if not, encourages them to be so). She is a girl who may have female friends, but it’s only gay men who truly understand her. She is a strident advocate of the homo-culture and does everything she can do make the world more “homo-friendly” and is quite in-your-face about it. She adores surrounding herself with good-looking, well-dressed men who party, all the while secretly hoping she will be the one and only woman who can “convert” him.
This was my experience with fag-hags in college, but words change so frequently it may mean a totally different thing today.
Fag hags are usually grotesque women who are adored and worshipped by gay men - not the other way around. Here are some examples: Judy in her last years, once the queen of fag hags, now forgotten, Liza, the daughter, Kay Thompson (yikes!), Elaine Stritch (yikes!), Bette Davis, Joan Crawford, Patti Lupone, Lea DeLaria (yikes!), the Charles Busch collaborator, Julie Halston, and many, many more. I’m sure there is a whole new set of them out there but I always find them so repulsive I try to avoid even seeing a photograph of them...