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When a female is not wearing any underwear under her clothes; as in, the equivalent of the male "freeballing".
Jenny decided not to wear underwear today. Her friend Jane asks: "Jenny are you Freeclamming again today?"

"Hellz yeah I'm Clamwagging today, I'm really Clamflapping and Clamcasting. I'm clamskipping my clam all over town.
by Lokidyonysos January 27, 2011
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