Source : Webster's Revised Unabridged Dictionary (1913)

Shiftiness \Shift"i*ness\, n.
   The quality or state of being shifty.

         Diplomatic shiftiness and political versatility. --J.
                                                  A. Syminds.

Source : WordNet®

shiftiness
     n : the quality of being a slippery rascal [syn: {rascality}, {slipperiness},
          {trickiness}]