unctuous
adjective formal disapproving uk/ˈʌŋk.tʃu.əs/ us/ˈʌŋk.tʃu.əs/
谄媚的;虚情假意的
Unctuous people or behaviour expresses too much praise, interest, friendliness, etc., in a way that is false and unpleasant.
his unctuous manner/voice/smile 他那虚情假意的举止／声音／笑容
Synonyms: fulsome oilyoleaginous smarmy