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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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 9, 2008
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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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The female version of teabagging in which the vagina is placed on one's face, usually to establish dominance. Frequently used by female video game players after fragging another player.
DUDE! K1LL3rClam83 just clam slammed me after she stuck me with a grenade!
by Milky Pirate March 4, 2008
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Female version of TeaBagged.

A female pulling down her panties doing a up and down motion over your face, each time touching your mouth/face when she does the down motion.
Ms. TNT clam slammed me when I was laying on the ground motionless!
by droopie April 8, 2009
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When one famale is to 'slam' their vagina against another persons forhead.
"First one asleep gets a Clam-Slam from Kayleigh".
by Icemang80 August 18, 2009
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