slipperiness

from WordNet (r) 3.0 (2006)

slipperiness
    n 1: a slippery smoothness; "he could feel the slickness of the
         tiller" [syn: {slickness}, {slick}, {slipperiness}, {slip}]
    2: the quality of being a slippery rascal [syn: {rascality},
       {shiftiness}, {slipperiness}, {trickiness}]

from The Collaborative International Dictionary of English v.0.48

Slipperiness \Slip"per*i*ness\, n.
   The quality of being slippery.
   [1913 Webster]