fall off the wagon
- (idiomatic) To cease or fail at a regimen of self-improvement or reform; to lapse back into an old habit or addiction.
- Though he fell off the wagon several times, he eventually succeeded in quitting.
- 2014 August 11, w:Dave Itzkoff, "Robin Williams, Oscar-Winning Comedian, Dies at 63 in Suspected Suicide," New York Times
- In 2006, he checked himself into the Hazelden center in Springbrook, Ore., to be treated for an addiction to alcohol, having fallen off the wagon after some 20 years of sobriety.