adjective. Causing or tending to cause sliding or slipping.

adjective. Tending to slip, as from one's grasp.

adjective. Not trustworthy; elusive or tricky.

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.

adjective. Having the quality opposite to adhesiveness; allowing or causing anything to slip or move smoothly, rapidly, and easily upon the surface; smooth; glib.

adjective. Not affording firm ground for confidence.

adjective. Not easily held; liable or apt to slip away.

adjective. Liable to slip; not standing firm.

adjective. Unstable; changeable; mutable; uncertain; inconstant; fickle.

adjective. Uncertain in effect.

adjective. Wanton; unchaste; loose in morals.

adjective. A malvaceous shrub (Fremontia Californica); -- so called on the Pacific coast.

adjective. 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.

adjective. Evasive; difficult to pin down.

adjective. Liable to slip; not standing firm.

adjective. unstable; changeable; inconstant

adjective. wanton; unchaste; loose in morals

adjective. not to be trusted

adjective. causing or tending to cause things to slip or slide

"You know, people always use the term slippery slope when it comes to ethical arguments, and I think it applies here as well."

dishonest  elusive  evasive  slippery ground  uncertain  

lubricious  nonstick  slick  sliding  slimed  

dirty  moist  muddy  shiny  slick  

Machiavellian  Machiavellic  acute  adipose  ambidextrous