Definitions by The Disturbed Doctor

Queefenstein's Monster 

A hideous mythical beast expelled from a foul smelling vagina during coitus. Occurs only during a full moon. The unleashed beast is evil and devours puppies and small children.

Dude, while I was doing your mother last night she expelled a Queefenstein's Monster that ate my dog.

Queefenstein's Monster by The Disturbed Doctor October 10, 2009