Chain reaction that happens when the driver in front of you on the freeway cleans their windshield, spraying droplets of screenwash onto your windshield, so you end up having to do the same - so does the guy behind you...

Based on the phenomenon of passing messages from person to person called Chinese Whispers
Brooke: "Man, that chain of Chinese Wipers we just passed went on for 8 cars straight - surely that's some kind of record...?"
Kelvin: "Dude, you're supposed to be looking at the MAP!!"
by dickyboy April 27, 2006
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