when a girl stops another girl from hooking up with a guy.
hey girl he's hot i'm going over to talk to him. oh shit look at that skank in my way trying to "clam bump me".

can you believe i was just "clam bumped".
by stewy loom April 2, 2011
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the act of to women (lesbians or bi) having sex by bumping there vagina's against eachother.
dude, i caught my ex and my mom clam bumping last night
by juneaus November 7, 2004
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The illusory idea that homosexual women may have sex by bumping one female's vaginal labia against another female's vaginal labia. A slander. Other forms: clam bumper(s).
"Those dikey chicks are off to go clam bumping."
by Spud January 28, 2004
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the act of rubbing the female clitoris together with another female clitoris
bumping clams refer to the opening of a clam shell, revieling the clam and bumping and grinding with another "clam" or clitoris until the friction generates a pearl....or an orgasm.....depends on whether we are talking clams or clitorises....
by the queen bee October 6, 2006
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a lesbian sex act which involves a certain mesure of flexibility. its rubbing and bumpung vaginas together
my dyke friends shave b4 bumping clams; man, i hope they dont get nether-beard burn!
by minghi May 17, 2003
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