In French, poudre de perlinpinpin names an imaginary magic powder, a storybook ingredient that supposedly fixes anything at once. The expression is also used figuratively for a supposed miracle cure or an empty promise, a remedy that sounds impressive but does nothing. That double meaning explains its life online, where the short phrase is shared as a knowing joke about instant solutions. In memes and short videos it works even for viewers who do not speak French, because the rhythm and fairy-tale sound carry the joke on their own.