Bird Person is a recurring character in Rick and Morty, the Adult Swim animated series that premiered in 2013, and his deadpan judgments about bird culture became one of the show's signature running gags. Fans clipped the line into reaction videos and memes that call out bad behavior with the mock-serious weight of a Law and Order DUN DUN sting, and it spread through soundboards and short-form edits as shorthand for labeling any petty move. It endures because the formula is endlessly reusable: any rude moment can be judged by an alien custom.