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:
a mixed bag
Meaning:
a varied collection of people or things
Example:
The festival promoters presented a mixed bag of musical styles at the music festival.
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