Inflammation of the gaga gland, found only in a select subspecies of homosapiens, collectively known as "homosexuals". The inflammation is due to any Gaga-related news or releases, accompanied by the urge to dance like a ho. It gives great pleasure to the homosexual. It is described as a "blowjob but for your ears".
The Judas release just gave me Gagaitis. I can't wait to drunkenly make out with ten guys at the club tonight when it plays!