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:
have a chip on one's shoulder
Meaning:
to seem to want to start a conflict or quarrel
Example:
Our neighbor has a chip on his shoulder and is always trying to start a fight.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.