v. To intentionally interfere with a woman who is trying to get laid, and results in said woman NOT getting laid. Usually done by a somewhat less attractive girlfriend. (This could be considered the female version of the cock-block.)
n. A person who is responsible for the act of beaverdamming
I was about to hook up with this hot guy at the Fort Kent Bar last night but then Nikki totally beaverdammed me! Why doesn't she mind her own business?!