Source : Webster's Revised Unabridged Dictionary (1913)

Slickness \Slick"ness\, n.
   The state or quality of being slick; smoothness; sleekness.

Source : WordNet®

slickness
     n 1: verbal misrepresentation intended to take advantage of you
          in some way [syn: {trickery}, {hocus-pocus}, {hanky
          panky}, {jiggery-pokery}, {skulduggery}, {skullduggery}]
     2: a kind of fluent easy superficiality; "the glibness of a
        high-pressure salesman" [syn: {glibness}]
     3: a slippery smoothness; "he could feel the slickness of the
        tiller" [syn: {slick}, {slipperiness}, {slip}]