door prize

Noun

 * 1) A gift given to people who attend a meeting, party, event, etc., especially one which is given on a random basis to one or some of the attendees.
 * 2)  A notional prize awarded to a cyclist who collides with the open door of a parked car.
 * 1)  A notional prize awarded to a cyclist who collides with the open door of a parked car.
 * 1)  A notional prize awarded to a cyclist who collides with the open door of a parked car.