A padiddle or perdiddle is a car that has one headlight burned out.

Different US customs suggest various responses to an encounter with a padiddle. Some people punch the roof, others kiss their neighbor, others honk the horn, others punch the person next to them in the arm, and still others shout, "Padiddle!" The most provocative version involves the losers removing one article of clothing.

The above actions can be carried out as a car game and are repeated most commonly in rural areas.