Source : Webster's Revised Unabridged Dictionary (1913)

Pash \Pash\, v. t. [Prob. of imitative origin, or possibly akin
   to box to fight with the fists.]
   To strike; to crush; to smash; to dash in pieces. [Obs.] --P.
   Plowman. ``I'll pash him o'er the face.'' --Shak.

Pash \Pash\, n. [Scot., the pate. Cf. {Pash}, v. t.]
   1. The head; the poll. [R.] ``A rough pash.'' --Shak.

   2. A crushing blow. [Obs.]

   3. A heavy fall of rain or snow. [Prov. Eng.]