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:
in a jiffy
Meaning:
very fast, very soon
Example:
I promised that I would be finished with the phone in a jiffy.
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