The exact origin of this clip is undocumented, and it appears to come from a user-uploaded soundboard rather than a known show, film or viral video. The phrase itself is a minced, sing-song twist on the old la-dee-dah dismissal, a way of saying whatever with maximum sarcasm. It circulates as a short reaction meme in edits, streams and comment sections, where its exaggerated cheerfulness makes petty or unbothered moments funnier. Its staying power comes from versatility: the line fits almost any situation that deserves a theatrical shrug.