Jevil is a hidden boss character from Toby Fox's Deltarune, first appearing in Chapter 1 in 2018. His voice clips and laugh became popular with fans because they match his chaotic personality and memorable boss fight. Online, the sound spread through Deltarune edits, animation memes and gaming compilations, where it is used to mark sudden madness or trickster energy. It still gets reused because Jevil remains one of the most recognizable side characters in the game, and the laugh is short, expressive and easy to fit into quick edits.