cold turkey
Cold turkey (noun) means the abrupt and complete withdrawal from an addictive substance, without tapering the dose or using any medication to soften the effects; also the physical symptoms this produces. Example: “He quit heroin cold turkey and shook for four days straight.”
How to use cold turkey
Learner’s notesIn plain EnglishStopping a habit all at once instead of cutting down slowly.
Informal but universally understood, including in medical settings where it describes unassisted withdrawal.
The most common form is the verb phrase 'go cold turkey', not 'do cold turkey'.
Trace the full origin ↓Fill the gap
Can you complete this real example?
He quit heroin _____ and shook for four days straight.
Etymology
Various explanations; see Cold turkey § Etymology on Wikipedia.