Idioms
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.
Idiom:
get on (someone) to do (something)
Meaning:
to ask or pressure someone to do something
Example:
I will get on my friend to return your book tomorrow.
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class