Jeffy is a central puppet character in SuperMarioLogan, a long-running YouTube comedy series built around Mario-inspired puppets and chaotic family storylines. His loud, over-the-top outbursts became one of the show's most recognisable traits, and clips of his screaming were soon lifted by fans for memes, reaction videos, and short-form edits. Because the sound is instantly recognisable and works without any context, it has stayed popular on soundboards and in gaming and comedy content years after its original episodes.