La Grippe Espagnol is French for Spanish flu, and as a soundboard clip the phrase works mainly because it sounds formal and slightly old-fashioned next to a modern joke about feeling sick. The clip has circulated as a short, shareable reaction sound rather than as part of a widely identified song, film or television scene, so its appeal comes from the contrast and the timing rather than a famous original moment. That makes it easy to reuse across edits where a brief illness joke needs a quick, knowing punchline.