Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.
Idiom:
buy off (someone) or buy (someone) off
Meaning:
to bribe someone
Example:
The union tried to buy off the politician.
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.