The line comes from the Seinfeld episode 'The Soup Nazi,' first aired on NBC in 1995, where a strict soup vendor played by Larry Thomas expels customers who break his ordering rules. The character was inspired by real New York soup seller Al Yeganeh, and the shouted catchphrase quickly moved beyond the show into everyday slang for a harsh refusal. Decades later it remains a shorthand reaction online, quoted in memes, chats and videos whenever a minor slip leads to a comically severe ban.