What does the idiom "one's flesh and blood" mean?

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. one's flesh and blood meaning, in what situations is it used?

Meaning of "one's flesh and blood"


The idiom ‘one’s flesh and blood’ is used to refer to close family members, typically children or grandchildren. It is used to express the idea that these family members are deeply connected to the person speaking, and therefore deserving of their loyalty, love, and protection.


The origin of this phrase is somewhat uncertain, but it is believed to date back several centuries. One possible origin is in a line from the King James Bible, where the phrase “flesh and blood” is used to refer to familial love and loyalty: “For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.” (Matthew 12:50). It is likely that the phrase was adopted and adapted to the English vernacular to refer to one’s immediate family.


This phrase is typically used to express a deep and abiding love and commitment to close family members. It is often said as a way of expressing parental love, loyalty, and protection for one’s children. It can also be used to describe the close bond among siblings or other close family relations. It is typically used in everyday conversation, as well as in more formal contexts, like public speeches or legal documents.

Example Sentences

  • "I would do anything to protect my flesh and blood."
  • "My sister is my flesh and blood and I love her unconditionally."
  • "My children are my flesh and blood and I will always be there for them."
  • "We must protect our own flesh and blood, no matter what."

The meanings of the words in the "one's flesh and blood" idiom

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.


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