An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.
Idiom:
make time with (someone)
Meaning:
to flirt with someone
Example:
The man tried to make time with the waitress in the restaurant.
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.