An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.
Idiom:
smoke (someone or something) out or smoke out (someone or something)
Meaning:
to force someone or something out with smoke
Example:
We smoked the rats out of their nests with the smoke.
List of common idioms, their meanings and examples of their usage in sentences
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.