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One's testicles, after the sound made when someone kicks a real man there.

See also clang.
Fucker tried to kick my clunk.
by Col. Dr. April 23, 2006
To stall your manual transmission auto.
You totally clunked it, you uncoordinated, illegitimate spawn of caucasian feces.
by Fergus McCool September 05, 2003
A racist term for a wide person.
Frank is such a clunk.
by Feasible Friend March 03, 2004