Source : Webster's Revised Unabridged Dictionary (1913)

Shifty \Shift"y\, a.
   Full of, or ready with, shifts; fertile in expedients or
   contrivance. --Wright.

         Shifty and thrifty as old Greek or modern Scot, there
         were few things he could not invent, and perhaps
         nothing he could not endure.             --C. Kingsley.

Source : WordNet®

shifty
     adj : characterized by insincerity or deceit; evasive; "a devious
           character"; "shifty eyes" [syn: {devious}]
     [also: {shiftiest}, {shiftier}]