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A handicapped driver with a blue handicapped placard on the license plate or dangling from the rear view mirror.

These are usually overly cautious elderly drivers, who drive very, very slow, still manage to swerve in their lane and brake unexpectedly for no reason.

The blueplate placard may be accompanied by stuffed animals placed near the rear windshield.
So Im already late for my appointment and of course I get stuck behind a fucking blueplate!
by DatPurpleStuff November 20, 2009