noun: A trophy car driven by pretentious douchebags (chodes) who want to show it off. This applies to giant gas-guzzlers, pimp rides, and uber-expensive "green cars." If the car is not being actively flaunted, this definition doesn't apply.
Look, there's Old Man Caruthers in his Hummer. What a chodemobile.
Douche: "Hey, guys, check out my Prius. It gets waaay better mileage than your cars."
Guy (to other guy): "Yeah, but it's a chodemobile.