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Wiktionary
padiddle

interj. An exclamation shouted during a game by the first player that sees an automobile with only one lit headlight, the said person being allowed to kiss or strike one of the other players. n. The game itself or an automobile spotted during the play of the game.

Wikipedia
Padiddle

Padiddle, alternatively spelled pediddle, perdiddle and kadiddle, is a Canadian and American slang term for a vehicle with a burnt-out headlight or brake light. Fog lights do not count as a padiddle even if used as primary lights. There is no such thing as a double padiddle. It is also the name of a nighttime travel game involving spotting such vehicles. Cars with only one illuminated tail light are called pidadle in some areas of the country.

Another version of Padiddle involves spotting a yellow car, such as a taxi or sports car and responding the same way. An optional variation involves calling out "Padunkle" upon spotting a car without headlights turned on at night, awarding the spotter double points.