When I search for definitions of the term "nappy," which I do periodically, I often get a lot of info about diapers, which are called nappies (like napkin) in some parts of the world. Sometimes you will get "having a nap, as in fabric," or something to that effect.
I searched it a few minutes ago, and found this, this, and this, which led to this. Looks like someone is catching on.
Trendwatchers and R&D departments in large corporations keep an eye on stuff like this. It helps them make a lot of money. Have you seen this? What about this?
Interesting, to say the least.