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The rendering of a person unconscious unexpectedly by a clubbing blow to the back of the neck or head, generally caused by a blunt object being swung at a person.
"Jon walked around the corner and got kadunked by Luke."
by Meatsack August 22, 2005
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To butt heads gently, generally with a young toddler
"Jedi, do kadunk!" and the toddler knows to gently bump heads with you.
by Shasta December 18, 2003
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A Replacement for Fuck, Shit and Damn.
You: AH! Ka-Dunk!

Buddy: What's Wrong?

You : I forgot my wallet at the resteraunt.
by Chaseaferd September 10, 2010
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