The line comes from Clueless, the 1995 teen comedy starring Alicia Silverstone as Cher Horowitz, whose confident, fashion-obsessed world made the phrase a defining piece of nineties slang. In the film, 'As if' works as Cher's instant, withering answer to anything she finds absurd or beneath her, and audiences quoted it long after leaving the cinema. It later resurfaced in reaction videos, memes and short-form edits, where a single sarcastic phrase could replace a whole argument. Its staying power comes from that efficiency: two words still signal total, stylish disbelief.