SLIP'PERY, adjective 1. Smooth; glib; having the quality opposite to adhesiveness; as, oily substances render things slippery 2. Not affording firm footing or confidence; as a slippery promise. The slipp'ry tops of human state. 3. Not easily held; liable or apt to slip away. The slipp'ry god will try to loose his hold. 4. Not standing firm, as slippery standers. 5. Unstable; changeable; mutable; uncertain; as the slippery state of kings. 6. Not certain in its effect; as a slippery trick. 7. Lubrious; wanton; unchaste.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI