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
Get the Freeclamming mug.
Going without panties, said of a female, so called because her pussy (aka clam) is free and unencumbered. A similar expression is "going commando," which can be used of either a male or female without underwear, but is more often used of a male.
"Freeclaming: A lot of girls like to secretly freeclam in the summer, but those who are caught are labeled a slut forever"
by Muff divah October 14, 2011
Get the Freeclaming mug.