A small blue plastic hammer of approximately 6 inches in length, owned by Mary, used for certain offensive purposes. Unlike Maxwell's famous Silver Hammer, Mary's Plastic Hammer is incapable of killing anyone, or even doing any significant damage. Instead, any individual who is hit on the head with the hammer is immediately turned into a nerd upon impact.
Little Mary had been playing with The Plastic Hammer for an hour or so when she became bored and tossed it behind her back, hitting Maxwell, her older brother, in the head and turning him into a nerd for the rest of his life.
by Encyclopedia Shitannica January 26, 2014