unctuous
🇺🇸
/ˈʌŋktʃuəs/
🇬🇧
/ˈʌŋktʃuəs/
Someone who is overly nice or complimentary in a way that feels fake or insincere.
The salesman had an unctuous smile that made me feel uncomfortable.
那個推銷員的油滑微笑讓我感到不舒服。