stop cold turkey

To stop doing or using something abruptly and completely. The phrase is most often used to describe the cessation of an addiction. A noun or pronoun can be used between "stop" and "cold." I tried quitting smoking for several years, using nicotine patches, gums, and even hypnotherapy. Eventually, I just had to stop cold turkey and rely on my own willpower. I'm so impressed that you were able to stop gambling cold turkey!