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 1, 2007
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A song sung by a female rock group pertaining to the subjects of heart break, hating men, or expressing ones self in a feminine way.
Man Taylor Swift's song, "Love Story" is one hell of a Clam Jam.
by Lucky16 January 13, 2011
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The female version of a cockblock; When a female blocks another female friend from scoring a cute boy, due to jealousy or anger.
(Jane was talking to a cute boy at a party when her friend Karen walks up)
Karen: "Okay Jane it's time to go, I have to go home and feed my cat."
Jane: "Aww Karen quit being such a clam jam!"
by FckAllYall October 16, 2010
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The female equivalent of 'fromunda cheese'

Smegma
Girl: I haven't showered in a week, check out this clam jam!
by shakzilla February 17, 2011
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The creamy white discharge of cum and lubricants release from a woman's vagina after a bout of good sex.
Did you see the amount of clam jam coming from that ho!
by Capt Beyke October 24, 2018
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The act of meeting up with friends at Lake George for a weekend of fun filled activities including Log Bay Day (getting stoopid drunk at Log Bay ((the great Barrier Reef outskirting the beautiful confines of Lake Jorge) in your boats that line up with other boats so you can make boat alleys where you meet new friends and hopefully get their clams). Preceding that is a fun filled concert with a preset band every year. You also get very drunk here is well. Throughout the weekend you try to stay off alcohol for a little bit so you can eat food every once in a while.
Dre: Hey, I can't wait to see the new Clam Jam '012 jersies for this year

Tad: Ya, there gunna be Rad!!!!
by thepet2123 April 20, 2012
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When a female has two cocks in her vagina at the same time.
Mike and Joe were fucking me last night and clam jammed my pussy.
by Dusty225 June 9, 2008
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