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:
give (someone) a hard time
Meaning:
to tease someone, to make trouble for someone
Example:
The girl gave her boyfriend a hard time about his new haircut. The new supervisor is giving me a hard time.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.