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Clam shiner means dickhead. It is a term you can use in public without offending those around you. Clam is slang for vagina. The penis head is "the shiner" when used the stimulate the woman during sex. Hence the term "clam shiner" in place of dickhead.
Why must you always be such a clam shiner around my friends?
by Abberdabber September 06, 2016
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