unpleasantly and excessively suave or ingratiating in manner or speech
<adj.all> buttery praise gave him a fulsome introduction an oily sycophantic press agent oleaginous hypocrisy smarmy self-importance the unctuous Uriah Heep soapy compliments
Oleaginous \O`le*ag`i*nous\, a. [L. oleaginus, oleagineus, belonging to the olive, fr. olea olive: cf. F. ol['e]agineux. See {Olive}, {Oil}.] Having the nature or qualities of oil; oily; unctuous.