Possibly originates from gay Author Dan Savage, who also does weekly Podcast called "The Savage Lovecast", in his podcast he has addressed various issues of relationships, sex, sexuality, fetishes, and other sex related topics, and issues of Faghaggery in his Podcasts
e.i. "If that guy is bi, she's not his hag, that's not faghaggery."
e.i. "what in the name of faghaggery is going on here"