Phwoar is a long-established piece of British slang for expressing sudden admiration, especially for someone attractive, and it has travelled online as a short spoken reaction rather than as a line from a single film or show. Because the word itself already carries the joke, creators do not need to explain it, and it has become a handy shorthand in meme edits, reaction videos and short-form clips. Its staying power comes from that instant recognition: one familiar, cheeky sound can signal attraction, surprise and humour at the same time, without slowing down the edit.