When one lesbian interferes between a lesbian trying to pursue another lesbian. The female form of cock blocking.
I would have gotten some pussy last night but this bitch was clam jamming me!
by Ryan and Ryan June 13, 2008
1 more definition
The act of lesbian lovemaking. See also scissoring.
I don't think Krissy and Melissa are dating; I think they're just clam jamming.
by Kitty Vicious December 01, 2007