The act of soundly flicking someone's ear so as to cause a loud snapping noise and a brief period of intense pain. Usually done to someone who has committed an idiotic act or said something stupid. Can be used as an alternative to spanking children or as an adolescent male bonding alternative to arm punching.
"Keep acting stupid Billy-Bob and I'll kerschtank you a good one!" ..or.. "Clean up your room or you'll get the kerschtank"
by Lorndawg Humplegg October 17, 2006
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