Zut alors is a traditional French exclamation that has been used for well over a century to express surprise, annoyance or disbelief in a polite, slightly old fashioned way. The word zut on its own is a mild interjection similar to darn, and the full phrase became a stereotype of French speech in English speaking comedy, cartoons and films. Online it survives as a short reaction clip because it is instantly recognisable even to listeners who do not speak French, and its theatrical delivery fits meme editing perfectly.