unctuous

Excessively ingratiating or insincerely earnest.

Containing or composed of oil or fat.

Having the quality or characteristics of oil or ointment; slippery.

Abundant in organic materials; soft and rich.

Of the nature of or resembling an unguent or ointment; greasy; oily; fat; soapy.

oily, or soapy feel when rubbed or touched by the fingers—a characteristic of steatite, talc, serpentine, and other magnesian minerals, due to the magnesia which they contain.

Having or characterized by unction; tending to religious fervor; especially, falsely or affectedly fervid, devotional, emotional, gushing, or the like; excessively bland or suave.

Of the nature or quality of an unguent or ointment; fatty; oily; greasy.

Having a smooth, greasy feel, as certain minerals.