An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.
in all one's born days
in all one's life
In all my born days I have never met a more stubborn person.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.