free clam

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 March 29, 2009

Free clam

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 6, 2010