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:
too big for one's britches
Meaning:
to feel more important than one really is
Example:
Our new boss is too big for his britches. He needs to change his behavior.
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