Source : Webster's Revised Unabridged Dictionary (1913)

Out \Out\, interj.
   Expressing impatience, anger, a desire to be rid of; -- with
   the force of command; go out; begone; away; off.

         Out, idle words, servants to shallow fools ! --Shak.

   {Out upon} or {on!} equivalent to ``shame upon!'' ``away
      with!'' as, out upon you!