The Collaborative International Dictionary of English v.0.48:

Nippitate \Nip"pi*tate\, a. [Cf. 1st Nip.]
   Peculiarly strong and good; -- said of ale or liquor. [Old
   Cant]
   [1913 Webster]

         'T will make a cup of wine taste nippitate. --Chapman.
   [1913 Webster]