The Taint(2011)

Overview:

The water is tainted. The Taint poisons the minds of men. It turns them into raging misogynists: monsters who want nothing more than to crush women's heads with rocks (or other objects). When society is transformed into a land of sadistic violence and horrible brutality, it is up to Phil O'Ginny and his hot friend, Misandra, to combat the horrible evil that is The Taint. Can they survive a world brimming with castration and endless head crushing?!