2 Answers

unc·tu·ous (ngkch-s)
adj.
1. Characterized by affected, exaggerated, or insincere earnestness: "the unctuous, complacent court composer who is consumed with envy and self-loathing" (Rhoda Koenig).
2. Having the quality or characteristics of oil or ointment; slippery.
3. Containing or composed of oil or fat.
4. Abundant in organic materials; soft and rich: unctuous soil.
[Middle English, from Old French unctueus, from Medieval Latin nctusus, from Latin nctum, ointment, from neuter past participle of unguere, to anoint.]
unctu·ous·ly adv.
unctu·ous·ness, unctu·osi·ty (-s-t) n.
Synonyms: unctuous, fulsome, oily, oleaginous, smarmy
These adjectives mean insincerely, self-servingly, or smugly agreeable or earnest: an unctuous toady; gave the dictator a fulsome introduction; oily praise; oleaginous hypocrisy;

Prter Popoff