Once in a blue moon

Although the meanings of the words in them do not make any sense when examined one by one, the word groups that are shaped according to the cultural roots of the language and that make sense as a whole are called idioms. Once in a blue moon meaning, in what situations is it used?

Meaning of "Once in a blue moon"

Meaning

The phrase "once in a blue moon" is widely used and has several meanings. Generally, it is used to describe something that is rare or unique, or something that happens very infrequently. Depending on the context, it can also refer to something that occurs so rarely that it is almost impossible to predict when it will happen. For example, if someone says that they have only seen a certain type of animal "once in a blue moon," it means that they have only seen it very rarely.

Etymology

The phrase "once in a blue moon" is of unknown origin. While there are several theories regarding its origin, none are widely accepted. One popular theory suggests that the phrase originally came from an old Scottish proverb, which stated that if a full moon occurred twice in the same month, it would be blue in color. This theory is unsubstantiated, however, as there is no scientific evidence to support it. Additionally, it does not explain why the phrase is used to refer to something that is rare or unique.

Usage

The phrase "once in a blue moon" is used in common language to describe something that is rare or unique. It can be used in both a positive and negative context, depending on the situation. For example, someone might say that they "only go to the beach once in a blue moon," implying that they don't go very often. Alternatively, someone might say that they "win the lottery once in a blue moon," implying that they usually don't win, but when they do, it's a special occasion.

Example Sentences

• I only go out to eat once in a blue moon.
• Winning the lottery once in a blue moon is a nice surprise.
• My dad visits us once in a blue moon; I never know when he'll show up.
• My brother is a real overachiever; he only gets sick once in a blue moon.

The Surprising Origins of Everyday English Idioms

Many English idioms have surprisingly dark origins, often rooted in violence, death, and superstition. For instance, the phrase "raining cats and dogs" is said to have originated in the 17th century, when heavy rain would often cause dead animals to wash up on the streets. Meanwhile, the idiom "rule of thumb" is believed to have originated from a law that allowed men to beat their wives with a stick no thicker than their thumb.