1 definition by Super Gerbil!
Mother of spouse. Self rightous, beastly, female entity. Master of deception. Often dyes her hair in order to reflect a younger age. One who professes to be all knowing. She Who is Evil. The Heartless One.
After his mother in law's week-long visit, Rob had to call an excorcist and bathe himself in Holy Water to rid his home of the evil presence that she left behind.
by Super Gerbil! September 5, 2003