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:
in the wrong place at the wrong time
Meaning:
something bad happens in a place or time where you happen to be
Example:
The man was in the wrong place at the wrong time when the car hit him.
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