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:
ruffle (someone's) feathers
Meaning:
to upset or annoy someone
Example:
I do not want to ruffle my friend's feathers as he is in a bad mood today.
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