cold turkey
US /ˌkoʊld ˈtɜːr.ki/
UK /ˌkoʊld ˈtɜːr.ki/

1.
突然戒斷, 徹底戒除
the sudden and complete cessation of an addictive habit or substance rather than a gradual reduction
:
•
He quit smoking cold turkey after 20 years.
他20年後突然戒菸了。
•
Going cold turkey on sugar can be tough.
突然戒糖可能很困難。