A vehicle used for drinking beer typically an SUV, Truck, or a Station wagon.
Disclaimer: Not to be confused with drunk driving just sapping in yo whip!
Johnny: Dude i got mad beers but my parents are home!
Tim: I got an idea lets bust it in the sap wagon.
Ex. 2
Al: Im down for sapping brews tonight before that party.
Jack: Yea son lets hop in the sap wagon.