bumping clams 

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....

bumping clams by the queen bee October 5, 2006

bumping clams 

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!

bumping clams by minghi May 17, 2003

clam bumping 

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

clam bumping by juneaus November 6, 2004

Clam Bumping 

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."

Clam Bumping by Spud January 27, 2004