An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.
Idiom:
poke fun at (someone)
Meaning:
to joke about someone, to laugh at someone, to tease someone
Example:
The woman is always poking fun at the way her husband plays golf.
List of common idioms, their meanings and examples of their usage in sentences
Idioms can be a powerful linguistic tool only when they are used in the right way in the right places.