The line comes from The Super Mario Bros. Super Show!, the 1989 live action and animated series based on the Nintendo games, where Mario was played and voiced by Captain Lou Albano. Clips from the show were widely reused in early YouTube Poop edits, which favoured short, shouty lines that could be looped or dropped into unrelated scenes. This pizza demand survived that era as a standalone meme sound, shared on soundboards and in gaming videos long after the original series ended.