A reference to an outside internet meme.
With the internet being as large as it is, it is obvious that memes form a large part of our society in the modern world. As such, modern works will often want to get in on the action by referencing said memes. Please do not confuse this with Ascended Meme, where the show references a meme that came from the show, or Meme Acknowledgment, where the show itself doesn't reference the meme, but something related to it (i.e. a voice actor or The Merch) does.
Examples:Comic Strips Video Games