unctuous

Adjective

Synonyms: buttery fulsome oily oleaginous smarmy soapy

WordNet 3.0

Adjective (1)

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”Synonyms: buttery fulsome oily oleaginous smarmy soapy

Webster's Dictionary (GCIDE)

Unctuous \Unc"tu*ous\ (?; 135), a. [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. [1913 Webster]

2.Having a smooth, greasy feel, as certain minerals. [1913 Webster]

3.Bland; suave; also, tender; fervid; as, an unctuous speech; sometimes, insincerely suave or fervid. [1913 Webster] -- Unc"tu*ous*ly, adv. -- Unc"tu*ous*ness, n. [1913 Webster]