A rag based product used to absorb the monthly blood of woman in order to prevent it dripping down her leg and causing embarrassment. Ancient Romans used dead hamsters due to the absorbancy of the fur. Today some tribes in Africa use dried leaves and after the cycle has finished they smoke the leaves to ward off evil spirits.
Brands include Tampax, Bodyform and Tesco Value.
Would come out in conversation thus:
"Shit, I have run out of fanny nappies" or
"Whats up John? I didn't get any last night the bitch was wearing a fanny nappy"