(In November 2017, the blog URL was deactivated and reclaimed.) The blogger, presumably role playing as Dr. Pig with the caption, “I diagnose you with gay.” (However, the description of the blog of the poster states, “most of my memes are from instagram” so the image may have been taken from there.)
Though the origins of the meme remain murky, one of the earliest instances of the meme on Tumblr comes from an image post published on 4 June 2017.Pig of the Nickelodeon animated series Back at the Barnyard. This meme is associated with the character Dr.
