The line comes from Matt Berry's performance as Laszlo Cravensworth, the flamboyant vampire in the television comedy What We Do in the Shadows, which follows a house of ancient vampires trying to cope with modern life in Staten Island. Berry's theatrical, old-world delivery turned a simple dismissal into a quotable reaction, and fans began lifting short clips of his dialogue for memes, edits and reaction videos. It endures because the phrase is universally useful: a polite, exaggerated way to say no, opt out and move on without starting an argument.