At least as old as
late 1970s, it meant a male
homosexual who's tastelessly over the top or hyper-faggish to an obnoxious potency, way too brassy and overacting the part of how he sees his own sexual personality, or else he's doing it half unawares, because of some unmet inner needs. A person who hangs out ordinarily with his /her close gay friends will not
dig being within earshot or line-of-sight of this type of individual. So it's not an anti-gay thing. It's a Taste thing. period. Many other gay men would ask for long-handled wooden spoons to
gag with rather than endure a Liberace clone attack.