Keep Eating Fatty circulates online as a short soundboard clip rather than a widely documented scene from a film or show, and its exact original source is not clearly established. That ambiguity has not stopped it spreading, because the phrase is instantly understandable and easy to reuse in food and reaction content. Creators tend to find it through soundboard libraries and short-video feeds, where its blunt humour fits eating challenges, mukbangs, and playful roasts between friends. Its continued use comes from that simplicity: a single teasing line that needs no context to land.