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"
One of the coolest mother fuckers on Aqua Teen Hunger Force. A mooninite. Can often be spotted with Err dickin around and making trouble, but it's damn funny.
Ignignockt: Err, get as much porn as you can carry. And grab the other end of this dresser. Hurry, before he thaws.
Err: Man, you gotta check this out.
Meatwad: Oh, yeah, baby. That's a neat car she's washing. You think that's a straigt six?
Err: I think I have a straigt six.
Ignignockt: Ooh, Err, your sexual innuendo is priceless.