Saccharine Vibe

Do you know those people who are just way too nice? Positive about everything, giving tons of praise, hyper-aware of social niceties, exceedingly well-groomed, and smiling as they’ve just closed a great deal on something? These people give off saccharine vibes— just too sweet, too nice to be plausible.

Emma: Hey John! You look amazing today! I made cookies last night, you want some? (while smiling contagiously)
John: Wow! That's so sweet of you! Has anyone ever told you that you give off a saccharine vibe?