Top Definition
where you hit someone round the head and shout "coonwhack". Then that means the other person has been coonwhacked and is now black.
mari and scotty on a bus

mari: "so then scotty, how are you doing?"
'scotty leans over the seat in front of him to look at mari'
scotty: "COONWHACK" - 'slaps mari round the head then sits back down'
by Zaphod-Beeblebrox September 16, 2004

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