Top Definition
When a female neglects or chooses not to wear panties for any number of reasons
Girl, that skirt was so tight, I had to free clam just to avoid panty lines.
by humminbird July 01, 2010

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A woman "going commando", or the female's version of "freeballing."
Oops, she did it again - apparently Britney decided to free clam that day and gave the photogs another free show.
by Kinaya November 11, 2008

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