Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Causing or tending to cause sliding or slipping: a slippery sidewalk.
  • adj. Tending to slip, as from one's grasp: a slippery bar of soap.
  • adj. Not trustworthy; elusive or tricky: "How extraordinarily slippery a liar the camera is” ( James Agee).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of a surface, having low friction, often due to being covered in a non-viscous liquid, and therefore hard to grip, hard to stand on without falling, etc.
  • adj. Evasive; difficult to pin down.
  • adj. Liable to slip; not standing firm.
  • adj. unstable; changeable; inconstant
  • adj. wanton; unchaste; loose in morals

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having the quality opposite to adhesiveness; allowing or causing anything to slip or move smoothly, rapidly, and easily upon the surface; smooth; glib.
  • adj. Not affording firm ground for confidence.
  • adj. Not easily held; liable or apt to slip away.
  • adj. Liable to slip; not standing firm.
  • adj. Unstable; changeable; mutable; uncertain; inconstant; fickle.
  • adj. Uncertain in effect.
  • adj. Wanton; unchaste; loose in morals.

from The Century Dictionary and Cyclopedia

  • Having such smoothness of surface as to cause slipping or sliding, or to render grip or hold difficult; not affording firm footing or secure hold.
  • Hence That cannot be depended on or trusted; uncertain; untrustworthy; apt to play one false; dishonest: as, he is a slippery person to deal with; slippery politicians.
  • Liable to slip or lose footing.
  • Unstable; changeable; mutable.
  • Lubric; wanton; unchaste.
  • Crafty; sly.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not to be trusted
  • adj. causing or tending to cause things to slip or slide

Etymologies

Alteration of obsolete slipper, from Middle English, from Old English slipor; see lei- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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