fall off the wagon

基本解释

However the study showed that one in ten fall off the wagon within one day, while almost a fifth manage to make it to a week or more.
不过，研究显示十分之一的女性只过了一天就改回原来的饮食习惯，而近五分之一的女性坚持了一周以上。
And if you fall off the wagon, don’t despair, just apologize to your partner, ask their forgiveness and recommit yourself to getting back in the habit.
如果你旧症复发，别灰心，只要向你的伴侣道歉，请求他们的原谅，再让自己回到习惯中去。
Break down just once — have one smoke, one single drink — and at best it's a "slip. " At worst it's a relapse, and more often it's a fall off the wagon: failure.
只是破戒一次，如一口烟一杯酒，要么最好说这是个“事故”，要么最坏则是旧习复发，而最经常的情况被称之为摔下了马车：失败了。
sphinx-3.blog.163.com

If you starve yourself (either of food and small spending), you will be more likely to fall off the wagon and blow the budget on a whim.
FORBES: Put Your Wallet On A Diet
However, there also were those who appeared to be tone deaf to the issue, or had already taken a great deal of money just as the wheels were about to fall off of the wagon.
FORBES: Does Your Culture Value a Fair Deal?
If the hypothesis is true, people would fall off the vege-wagon more often when exposed to real bacon sizzling in the pan.
FORBES: The Seductive Power Of Bacon