Chucky first appeared in Child's Play in 1988 as a doll possessed by serial killer Charles Lee Ray, voiced by Brad Dourif, and his unsettling laugh became one of the franchise's most recognisable traits across its sequels and later television series. Clips of that laugh spread online as a reaction sound, especially in horror edits, prank videos and short-form memes where a playful voice hiding a threat fits the joke. It remains popular because it is instantly recognisable even without showing the doll, giving creators a quick shorthand for creepy, mischievous glee.