Top Definition
The female equivalent to the cock block.
If you're familiar with the term "Cock Block," you know that it means one dude messed up another dude's game with the ladies. Well, this happens to girls too. And we (most of us) don't have cocks.

If you've ever been obviously checking out a guy and then your friend decides to "claim" him by walking up to him and touching his polo shirt and exclaiming, "I'm soooo drunk right now omg!"- you've been clam jammed.

If you've ever been hitting it off with a guy and then you tell him his pong game is weak, you've been clam jammed.. by yourself, I might add.
by KateSauce January 27, 2008

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A new age cover band in central Minnesota
Hey did you see Clamjam last night at the Fineline?
by Mumbo Jumbo dos February 07, 2013

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A party of only girls (or at least 80% ladies), where there is a substantial abundance of the clam.
Jane invited her friends to a party that will "surely involve copious amounts of penis" Upon arrival her female friends find a ClamJam: an abundance of women, Bitch Drinks, chick flicks, and not a single sausage in sight. Bad form Jane, bad form.
by Pardz Bru October 28, 2010

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Large group/party consisting primarily of vagina. I.e., equivalent to the male version "sausage fest".
Person A: So, how was the shin dig?

Person B: It was a total clam jam!
by Booka88 June 21, 2010

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one who prevents a female from scoring sexually.
Don't clam jam her, Christina is trying to hook up with him.
by Xtina1925 June 07, 2010

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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 equivalent of tea bagging.
Janice's friend passed out drunk, so she clam jammed her.
by Beadle79 June 26, 2012

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A dose of semen that has been extracted from a vagina with a vaccuum cleaner hose after it has been left to frement for at least 24 hours.
You'd better get that out of there before it turns into clam jam.
by CYPHER9x9 May 18, 2011

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