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ad. According to the rules of an old drinking game in which the drinker upturned the empty cup and had to drink more if the remaining droplets spilled beyond the edge of his fingernail.

ad. A kind of mock Latin term intended to mean, upon the nail; -- used formerly by topers.

ad. Good liquor, of which not enough is left to wet one's nail.

On the nail: used of drinking, with reference to the custom of turning the glass over the thumb to show that there was only a drop left small enough to rest on the nail: as, to drink supernaculum.

n. Wine good enough to be worth drinking to the bottom; good liquor; hence, anything very fine or enjoyable.

"And the picture of the banquet "when they fell to the chat of the afternoon's collation and began great goblets to ring, great bowls to ting, great gammons to trot; pour me out the fair Greek wine, the extravagant wine, the good wine, Lacrima Christi, supernaculum!""