A party, meeting or gathering that is exclusively, or with a significant majority of, females.
The female equivalent of a sausage fest
She'd told me there was going to be some hot guys there but it turned out to be a complete clam clan.

Party on girls! Friday night, it's gonna be a Clam Clan so lets go crazy without the partners, k?
by Scribbles NZ January 7, 2009
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A group who has hooked up with the same girl. Especially when a straight guy and a bi-sexual or lesbian chick hook up with the same girl!
Did you hear that Zach and Whitney joined the clam clan, they both hooked up with Rachel this weekend?
by ClamClan October 23, 2019
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