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:
meet one's Waterloo
Meaning:
to meet one's final and most difficult or impossible challenge (Napoleon was defeated at Waterloo)
Example:
The team met their Waterloo when they went to the tournament to meet the best team in the country.
List of common idioms, their meanings and examples of their usage in sentences
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.