Top definition
When two women aggressively rub their vulvae together during sexual intercourse.
"Stacey, do you want to go to spinning class with me?"

"No way, I was up all night clam slamming with Melissa, and my crotch is on fire."
by Emily Jo Ann March 23, 2010
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The vengeful act of crapping on a lover's chest while they sleep.

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2
The act of two females putting themselves between each others' legs to pound thier genitalia together for mutual sexual satisfaction.
Those two girls look happy. I bet they spent the whole night clamslamming.
by Steve52 May 25, 2009
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1) I am totally going to clam slam her while she's sleeping.
2) You guys going clam slamming on Sunday?
by bizzy mark March 08, 2008
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4
The female version of cock blocking. To hinder ones female associate from getting any action whether accidential or intentional.
"I talked to the tool for a damn hour only to have clam slamming Rhianne go make out with him in the corner."

"I hate it when Cindy gets drunk.. she turns into such a clam slammer."
by Barbarella September 26, 2005
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