With no clear original source attached to the clip, Smooth Like PB has circulated mainly as a short reaction sound shared between meme pages and video editors. The phrase itself is a familiar piece of everyday slang, comparing a flawless movement or transition to the texture of smooth peanut butter, and that simple image is what makes it easy to reuse. Creators tend to reach for it when a moment needs a calm, confident punchline rather than a loud effect, and its short length makes it easy to drop into edits, streams, and social posts without breaking the flow.