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11.
(n.) - the female version of a cock block; when a girl sabotages another girl's attempt to get some.
"This guy was hitting on me last night and asked me home, but Cara was being super clingy and made me leave with her instead; whatta clam jam!"
by garry larry July 01, 2013
3 1
 
1.
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
5587 2786
 
2.
the female version of "cockblock"
Beth moved in on Brian when Megan was trying to hit on him; it was a definite clamjam.
by Sydney Banks May 25, 2006
164 39
 
3.
to keep a woman from getting laid, the female version of a cock block
Tina thought she had this guy at a party, but her friend completely clam jammed her by mentioning she was pregnant in front of him.
by Billheimer December 10, 2008
152 78
 
4.
The female version of the cock-block. Also known as box blocked
That coochie ran a clam jam on me
by MisoBored December 19, 2011
81 39
 
5.
-noun, verb, clam jamming, clam jammed

1) noun.
A gathering that is predominantly female. The opposite of sausage fest.

2) noun. (clam-jammed)
A female cock block
Example 1: The Lilith Fair music festival is a giant clam-jam.

Example 2: I almost hooked up with that girl last night, but I got clam-jammed by her friend.
by Mestas May 26, 2011
39 13
 
6.
(noun)the female equivalent of a Cock-Block; a person who interferes with a woman's chance of getting laid, lucky, or boned; generally the "ugly friend" or "previously rejected."
(verb) to block a female from getting sex.
also Clam-Jammy (adj) describing a person with nookie blocking qualities, who may pose a threat to other men-seeking women.
"Jane, you are a bitter Clam-Jam! That guy was incredibly hot, and now he's gone!"
"That Clam-Jam may be five-foot-ten, but I have the Kama Sutra memorized and he'll never know."
"I am going to Clam-Jam Samantha, because that nasty wench spilled my drink and flirted with my boyfriend."
"There is a very Clam-Jammy cougar leaning at the bar, and I'd like to cut off her stilettos with a nail file."
by Colleen E. December 30, 2007
38 17
 
7.
The miscalculation of distance and/or location of the vaginal opening during rigorous sex which results in the penis slamming against the outer labia or groin.
He drove in deep but missed his mark, resulting in the mother of all Clam-Jams that left him writhing in pain.
by Gottaring January 17, 2012
16 10