Idioms
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.
Idiom:
rant and rave about (someone or something)
Meaning:
to shout angrily and wildly about someone or something
Example:
The man was ranting and raving about the bad service at the restaurant.
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