UNCTUOUS
buttery, fulsome, oily, oleaginous, smarmy, soapy, unctuous
(adjective) unpleasantly and excessively suave or ingratiating in manner or speech; “buttery praise”; “gave him a fulsome introduction”; “an oily sycophantic press agent”; “oleaginous hypocrisy”; “smarmy self-importance”; “the unctuous Uriah Heep”; “soapy compliments”
Source: WordNet® 3.1
Etymology
Adjective
unctuous (comparative more unctuous, superlative most unctuous)
(of a liquid or substance) Oily or greasy.
(of a wine, coffee, sauce, gravy etc.) Rich, lush, intense, with layers of concentrated, soft, velvety flavor.
(by extension, of a person) Profusely polite, especially unpleasantly so and insincerely earnest.
Synonyms
• (of a liquid): oleaginous, saponaceous, slimy; see also unctuous
• (of wine, coffee, sauce, gravy etc.): savorous
• (profusely, especially unpleasantly, polite): creepy, effusive, groveling, oleaginous, slimy, sycophantic; see also sycophantic
Source: Wiktionary
Unc"tu*ous, a. Etym: [F. onctueux, LL. unctuosus, fr. L. unctus
anointment, fr. ungere, unctum, to anoint. See Unguent.]
1. Of the nature or quality of an unguent or ointment; fatty; oily;
greasy. "The unctuous cheese." Longfellow.
2. Having a smooth, greasy feel, as certain minerals.
3. Bland; suave; also, tender; fervid; as, an unctuous speech;
sometimes, insincerely suave or fervid.
– Unc"tu*ous*ly, adv.
– Unc"tu*ous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition