a lesbian woman. The damming can be carried out by either male or female culprits.
I'm pretty sure that chick is beaver damming you right now.
When another person of any gender gets in the way of a woman's attempt to initiate sexual contact with another woman. This can be by distractions or their own sexual flirtations.
Dude, I was at the bar with Sheila and she totally started Beaver Damming me for that ginger chick in the corner! I won in the end though- who's the beaver dam now!!
The female expression to say "cockblocking".
Elisa beaverdammed Charlotte the other day, she did not get laid because of the beaverdamming that went on.
Female version of cock blocking.
I was trying to hook up with that cute guy at the bar, but Lori keeps beaver damming me.