No longer maintaining a program of self-improvement or abstinence from an undesirable habit, especially drinking alcohol.(adverb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "off the wagon" in a sentence
"And Lord Bhima and the sinha disappeared and Mr. Spock heard them jump off the wagon the next moment."
"Give your patients and your clients the 3-Minute Survey, and you will quickly see why they resist your efforts and fall off the wagon again and again."
"An 'again, an' for the last time, "he gave me his blandest lat smile," don't evah think you can jump off the wagon long the way."