Guys whom use photos of females they dont know to pretend to family and friends they have a girlfriend . Abbreviated to IGS
That dude's single. Nah he showed me a photo of his girlfriend. Dude ! He downloaded that pic of the net. Ahhh so he's got invisible girlfriend syndrome then....... Yep.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi