What does "Once in a Blue Moon" mean? It’s a popular English idiom used in daily conversation. Meaning: Something that happens very rarely. Hindi Explanation: Jo cheez bahut kam hoti hai, use hum "once in a blue moon" kehte hain. Learn daily use English idioms with simple Hindi explanations. Perfect for students and beginners improving their spoken English and vocabulary. Subscribe to Sanjivan Classes for English learning tips, grammar, idioms, and more! #OnceInABlueMoon #EnglishIdioms #LearnEnglish #SpokenEnglish #DailyEnglish #IdiomsWithMeaning #EnglishTadka #SanjivanClasses #Shorts #VocabularyBuilder