Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.
the immediate and complete withdrawal from something on which one has become dependent (can be used for drugs such as heroin or things like tobacco)
The woman stopped using drugs cold turkey.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is defined as - a group of words in a fixed order that has a particular meaning that is different from the meanings of each word on its own.