'Chachwagon' a.k.a, f.y.i, (chach+wagon). This is a word used to describe a vehicle full of your friendly neighborhood chaches. This vehicle can range from a 99' Ford Forerunner, to a decked out Mustang Charger. Either way, if you are walking down the street and a Natty Light decks you in the back of your skull, you probably just got harassed by a chachwagon.
-"Dude this party is fucking awesome"
-"I know man the guy:girl ratio in here is spectacular! Oh, wait. FUCK! Here comes the chachwagon!"
-"Damn man, this party went from hopping to a sausage fest really fucking fast..."