A Denver boot on a parked car.
a large metal clamp locked to a wheel of a motor vehicle by the police to immobilize the vehicle: used primarily to force people to pay their parking tickets
Origin of Denver bootafter Denver
A device locked to the wheel of a parked vehicle to keep it from being driven, used especially to force payment of fines for unpaid parking tickets.
Origin of Denver bootAfter Denver, one of the first cities to use it.
(plural Denver boots)