When you see a Volkswagen beetle or a “punch buggy” car either driving by or parked on the street, you turn to the person nearest to you and punch them on the arm while saying “Punch Buggy Blue!” or whatever the color of the car is that you see.
Be warned that you have pointed out the punch buggy to your victim and now, they too, can call out the car and punch YOU, unless you follow your original statement with the proviso “No punchbacks!”
From Wikipedia: “Punch buggy (also called punch bug, punch dub, piggy punch, slug bug, or beetle bug[1]) is a car game generally played by children in which participants punch each other in the arm upon first sight of a Volkswagen Beetle while calling out “Slug bug!” or “Punch buggy!” in reference to the Beetle’s nickname, the Bug. The color of the Beetle is also stated.”
