Source : Webster's Revised Unabridged Dictionary (1913)

Snick \Snick\, n. & v. t.
   See {Sneck}. [Prov. Eng. & Scot.]

   {Snick up}, shut up; silenced. See Sneck up, under {Sneck}.

            Give him money, George, and let him go snick up.
                                                  --Beau. & Fl.