Idioms
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.
Idiom:
on the up-and-up (up and up)
Meaning:
to be honest/trustworthy/sincere
Example:
I do not like that company because they are not on the up-and-up.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.