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1.
When two lesbians get together for some action and rub their vagina's together. IE: The lady's clams have a good old tussle
by Aldo May 28, 2003
 
2.
this is when two females engage in performing the act of running at each other, and jumping from about one meter and a half apart while trying to cause the clitoris or other parts of the vagina to connect in a sexually satisfying way
clamjousting similar to super market jousting without the trolleys and two women wearing no clothes instead

also see female clam.
by junior, snowboard June 28, 2006