Clamhamper

A Clamhamper is a woman that doesn't let her female friends score with guys by blocking her friend's game.

Essentially this is the female version of "Cockblocker"

1. "I was at the club and Lizzy was being a real clamhamper with this cute guy I was talking to. I ended up leaving alone."

"Damn, that really sucks!"

2. "Dude I so was talking to this girl but when it came time to leave her big fat friend came over and grabbed her hand and dragged her away."

"What a clamhamper"