in. to resume drinking after having stopped. (The wagon is presumed to be the water wagon.) : It looks to me like he wanted nothing more than to fall off the wagon.
in. to resume any previously stopped behavior including smoking, drug use, overeating, or any other disavowed behavior. : He's back to watching TV again. Fell off the wagon I guess.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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