Idiom: Once in a blue moon
Meaning: If something happens once in a blue moon, it happens very rarely indeed.
Country: International English | Subject Area: Colours | Usage Type: Both or All Words Used
All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.
Similar Idioms
- Between the devil and the deep blue sea
- Feeling blue
- True blue
- True blue
- Out of the blue
- Till you're blue in the face
- Bolt from the blue
- Over the moon
- Blue-eyed boy
- Blue blood
- Scream blue murder
- Hot as blue blazes
- Thin blue line
- Go blue
- Talk a blue streak
- Ragged blue line
- Hung the moon
- Boys in blue
- Be true blue
- Don't know whether to wind a watch or bark at the moon
- Blue skies
- Black and blue
Idiom eBooks from UsingEnglish.com
Buy our lists of British English, American English and Animal idioms in PDF format. They're perfect to use offline for reference or for use in class!
If you have a question about idioms, ask us about it in our Idioms Discussion Forum.
If you know of an idiom that you would like to be listed here, please use our online form to suggest an idiom.
See also:
- View examples in Google: Once in a blue moon
- Idiom Quizzes