Idioms
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.
Idiom:
get (something) off one's chest
Meaning:
to talk about something that has been bothering you
Example:
I told my father about my problem at work so that I could get it off my chest.
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