Relatives gather at a mansion to celebrate the title characters' 92nd birthday and to quarrel over the will. The black sheep of the family isn't invited, and sends a cursed gift which turns the elderly women into bloodthirsty demons. Mayhem ensues; which consists of murder, cannibalism, and dismemberment. Also, excessive eyeshadow, needless shoulder-pads, wooden acting, and confusing accents. Here's a trailer:
Hmm. That's odd. It looks as though someone replaced my blood, gore and rampaging grandma-filled trailer with a clip of a woman from Belarus playing slide guitar with a light bulb. Oh well, you get the idea. I watched Rabid Grannies on Netflix Instant Streaming.