Bill Cipher is the triangular dream demon and main antagonist of Disney's animated series Gravity Falls, which aired from 2012 to 2016 and was created by Alex Hirsch, who also voiced the character. His exaggerated, theatrical laugh became one of the show's most imitated traits, clipped and shared across YouTube compilations, TikTok edits and meme soundboards after the series finale. It endures because the show keeps finding new young audiences, and the laugh instantly signals playful, all-powerful villainy in any edit.