parking troll

A person who, in densely populated areas where demand for parking is high, intentionally approaches an automobile or motorcycle as if they are about to leave, then either stalls by checking their phone, or after a brief stay in the car, closes the door and walks away. A parking troll typically does this in order to annoy the parking campers.

Hey, did you see that parking troll approach the car to annoy the parking campers?

parking camper

A person, who in a heavily populated city insists on their self-importance by blocking traffic on the street or in a parking lot or parking structure while waiting for a person, who appears to be leaving to exit their parking spot.

Oh, we got another parking camper. Look at that selfish piece of excrement, he's been holding up traffic for over a minute in the hopes that the person is about to leave their spot.