1.Originally, a cutout of a poliecman in a marked car parked on the side of the road.

2. An empty police car parked on the side of the road to discourage speeding. Sometimes with a newspaper suspended from the headliner, a cardboard cutout as described in 1, or a box of donuts on the dashboard.
There was a cardboard charlie on the turnpike tonight. It was obvious as the windshield was covered in more salt than an admiral's nutsack.
by G-skillet January 27, 2014
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