Once in a blue moon
The phrase "Once in a blue moon" is an idiom that is used to express an event or occurrence that happens very rarely or almost never. It refers to a situation that is very uncommon, unusual, or happens once in a long span of time.
Enjoy word games? Many English phrases are difficult to understand. This fun new word game challenges you to solve puzzles about English phrases. When you solve a puzzle you earn points and can see the definition and origin of the phrase.
The more you play the more you learn!