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:
wise guy
Meaning:
a person who acts as if he were smarter than other people
Example:
The boy always acts like a wise guy when he is in a group.
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