The 7 Grand Dad joke comes from a bootleg Mario-style game that replaced its hero with a Flintstones-like character, creating a strange mash-up that players and remix channels turned into a running gag. Clips of its music, characters and catchphrases spread through gameplay streams, edits and soundboards, where the absurd combination became the joke itself. This yabba dabba doo version keeps that spirit alive, pairing the familiar cartoon shout with Luigi for a quick, recognisable nod that fans of the meme spot straight away.