Available Definitions:
1) a. - Having the quality opposite to adhesiveness; allowing or causing anything to slip or move smoothly, rapidly, and easily upon the surface; smooth; glib; as, oily substances render things slippery.
2) a. - Not affording firm ground for confidence; as, a slippery promise.
3) a. - Not easily held; liable or apt to slip away.
4) a. - Liable to slip; not standing firm.
5) a. - Unstable; changeable; mutable; uncertain; inconstant; fickle.
6) a. - Uncertain in effect.
7) a. - Wanton; unchaste; loose in morals.