Very recently it has become a new slang word for the bald head of a man that women (usually a spouse or girlfriend) use to rest their feet on while watching tv or just lounging. It is actually very therapeutic.
Last night I rested my feet and painted my toenails on Alberto's smooth footstool while he was watching the game.
A bald head to lie your feet on when you are relaxing at home. It is much more comfortable than an actual footstool. The bald head ideally should be waxed or completely shaved so that it does not tickle or scratch feet. Some people also call this a baldy.
I wish I had my own human footstool or baldy instead of having to use this harder footstool from the store.