unctuous /ˈʌŋktʃəwəs/ adjective Learner's definition of UNCTUOUS
[more unctuous; most unctuous] formal + disapproving
—
used to describe someone who speaks and behaves in a way that is meant to seem friendly and polite but that is unpleasant because it is obviously not sincere谄媚的;阿谀奉承的;油腔滑调的
— unctuousness
noun [noncount]