smarmily

/ˈsmɑrmɪli/
adverb
  1. In a way that is insincerely polite or charming, usually to get something.
    • The host spoke smarmily to the guests, but everyone knew he didn't mean it.
    • He smiled smarmily at the teacher, hoping she would forget the homework.
    • She smarmily complimented her rival's outfit, then rolled her eyes behind his back.
Antonyms
What does "smarmily" mean? | whatsthatwordmean | whatsthatwordmean