Bill Cipher is the main antagonist of Gravity Falls, the Disney animated series created by Alex Hirsch that aired from 2012 to 2016. Voiced by Hirsch, the yellow triangular demon became one of the show's most quoted villains for his playful cruelty and cryptic jokes. Short lines like this one were later clipped and shared on soundboards and in fan edits, where his distinctive voice instantly signals mischief. Its brevity makes it easy to reuse as a reaction, keeping the character popular long after the series ended.