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:
a millstone around (someone's) neck
Meaning:
a continual burden or handicap for someone
Example:
The empty store was a millstone around the neck of the small businessman.
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.