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1.
A game you play, similar to Slug Bug, but when you see a G Wagon, you yell "G Wagon" and punch the fuck out of who ever is sitting next to you. Be careful not to confuse Jeep Commanders or any similar looking cars, or else they get to punch the fuck outta you!!
"G WAGON!!"

"Damn, you dick!"
by Shanghai Sex November 09, 2009
 
2.
Popular nickname, referring to the Mercedes-Benz G class sport utility vehicle.
I seen Oprah Winfrey in an all black G Wagon with bulletproof glass, and secret-service tint.
by Vic Damone Jr April 06, 2006
 
3.
Mercedes-Benz G-Class...Ugly, yet so so fresh.
G-Wagon so fly
by Enrichel June 19, 2003