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

1.
abrupt, rigoureus, plotseling
the sudden and complete cessation of an addictive habit or substance rather than a gradual reduction
:
•
He quit smoking cold turkey after 20 years.
Hij stopte abrupt met roken na 20 jaar.
•
Going cold turkey on sugar can be tough.
Abrupt stoppen met suiker kan moeilijk zijn.