Papyrus comes from Undertale, the 2015 indie role playing game by Toby Fox, where the tall skeleton dreams of joining the Royal Guard and capturing a human. The game has no full voice acting, so his famous written laugh, NYEH HEH HEH, was voiced by fans in dubs, animations and edits. Those versions spread across YouTube and meme communities, turning the laugh into a reusable reaction sound. It remains popular because it captures Papyrus perfectly, earnest, boastful and impossible to take seriously as a threat.