A person, in this case a female, who somehow attracts gay men. Not always in a sexual way, but in ways in which a man who was questioning their sexual orientation before meeting this person, figures out they're gay and reveal their orientation to said person before anyone else. Typically this sucks for the female, as 90% of the men that have come out to this female are very, very attractive.
Kyle: Paige, I need to tell you something. I just figured it out, and you're the first person I've told this to.
Paige: What is it?
Kyle: I'm gay.
Paige: Oh my gosh, you're the 10th person to come out of the closet to me first this past year! I'm such a fagnet