Carbage

Empty potato chip bags, candy wrappers, water bottles, and other debris accrued in one’s car.

After I go on a road trip, my car is filled with carbage for weeks!

Carbage

Any and all trash that you find in an automobile. Most commonly in doors, on floors, and in carseats of small children.

Jerry, could you get the carbage in Lily's carseat? I want the car clean.