Idioms
An idiom is a group of words, or in other words, a phrase that has a meaning other than its literal meaning of the words in it.
Idiom:
not move a muscle
Meaning:
to remain perfectly motionless
Example:
I was told to not move a muscle while the dentist was working on my teeth.
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