Clam Bump 

Another term for scissoring.

Hey babe, wanna clam bump?

Clam Bump by King Clam Bump August 30, 2013

clam bumper

A homosexual woman. (slander)

Man: "How did I know my girlfriend would run off with a clam bumper?"

clam bumper by Spud January 27, 2004

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 bumper

lesbian

"Gee, I never would've guessed that Rosie O'Donnell was a clam bumper.", he said sarcastically.

clam bumper by Mike Stander August 1, 2003

clam bumper

Lesbian

"you two clam bumpers wanna be alone?"

clam bumper by like2watch August 1, 2003

Clam Bumpers 

One definition of lesbians, (clam meaning vagina) insisting that the two women have sex by rubbing one of their vaginas against the others vagina.

Cindy and Martha love eachother, they are probably clam bumpers.

Clam Bumpers by leanna :) April 25, 2006

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