Source : Webster's Revised Unabridged Dictionary (1913)

Firk \Firk\, v. t. [Cf. OE. ferken to proceed, hasten, AS.
   fercian to bring, assist; perh. akin to faran to go, E.
   fare.]
   To beat; to strike; to chastise. [Obs.]

         I'll fer him, and firk him, and ferret him. --Shak.

Firk \Firk\, v. i.
   To fly out; to turn out; to go off. [Obs.]

         A wench is a rare bait, with which a man

         No sooner's taken but he straight firks mad.B.Jonson.

Firk \Firk\, n.
   A freak; trick; quirk. [Obs.] --Ford.