A kind of mock Latin term intended to mean, upon the nail; used formerly by topers. "Drinking super nagulum (supernaculum), a device of drinking, new come out of France, which is, after a man hath turned up the bottom of the cup, to drop it on his nail and make a pearl with that is left; which if it slide, and he can not make it stand on by reason there is too much, he must drink again for his penance."
...