\Su`per*nac"u*lum\, adv. & n. [NL., from L. super
over + G. nagel, a nail, as of the finger, or a corruption of
L. super and ungulam claw.]
1. A kind of mock Latin term intended to mean, upon the nail;
   -- used formerly by topers. --Nares.
         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.                          --Nash.
2. Good liquor, of which not enough is left to wet one's
   nail. --Grose.