look up any word, like hobnocker:
 
1.
A Vagina that is so nasty you think it talks to you.
"Dude that chick that I went home with after we finished bar hopping had a total vagmonster."
by Cracko November 05, 2011
 
2.
A girl when she is on her period.
Jenn is being such a vag monster today!
by AF06 November 27, 2005