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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The act of receiving a blowjob while taking a shit
Suzie gave me a kadunk and paid for it with the smell of her life!!
by billybob674 June 28, 2007
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