An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.
right under one's nose
to be in an obvious or nearby place
I found the calculator right under my nose after searching for it for an hour.
List of common idioms, their meanings and examples of their usage in sentences
An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.