There is no single widely documented source for this clip, so it is best understood as a soundboard meme rather than a line from a film or show. It has circulated among meme and pet-video creators as a short, easily reused reaction sound, often attached to footage of cats looking soft, sleepy, or completely indifferent. Its staying power comes from that simplicity: the phrase needs no context, works in almost any cat clip, and instantly signals playful affection. That makes it a handy shorthand for the familiar online joke about wanting to squish a cute cat.