a cop that is incredibly arrogant, inept, or just plain stupid. They usually get mad at teenagers for doing things like having conversation while in the lobby of a movie theater, standing outside a Mcdonalds or for being cooler than them. They typically abuse their power. The term was derived from the police force of Parker,Colorado.
i was at the mall and some stupid parker cop gave me a ticket for playing hacky sack. he called it "a projectile"