It means to be sober. If you fall off the wagon you have begun drinking again/relapsed.
It's a car that follows the last of the racers, to pick up anyone too tired/injured to go on. Sometimes called the broom wagon as well.
hang on to the water wagon
The expression "go on the wagon" typically means to abstain from alcohol. "Westing Game" is a reference to the mystery novel "The Westing Game" by Ellen Raskin. So, "to go on the wagon westing game" could mean a play on words, suggesting abstaining from alcohol while engaging in a mysterious or challenging activity.
Plaustra.
"Paddy Wagon" is a historic euphemism for a police van or wagon with room for multiple culprits in a secured rear section.
wagon
"Going on the wagon" means to stop drinking alcoholic beverages.
On the wagon means you are giving up alcohol. You are not going to drink anything alcoholic. If you fall off the wagon, you've slipped up and had a drink.
Volk wagon
dragonflagondragon
2to10 mph
A drey is a wagon for hauling beer barrels.