Have you ever gotten a weird feeling about someone and couldn't really put your finger on why?

Like, when they smile way too big and it seems inauthentic and gives off creepy vibes? When they're way too curated and it seems like they're hiding something? When they have odd behaviors that aren't necessarily anything terrible, but just seem a bit weird in a way that makes you feel kind of uncomfortable? Especially vindictive and/or attention seeking type stuff?

I don't know, this person is someone I knew years ago, but is still a local, and them and their family are super curated. But, something isn't passing the sniff test, and this person gave me such weird vibes that when I was working in a building with the door open and saw them on the sidewalk, I immediately turned my back away from them and kind of inside, and hoped they wouldn't recognize me (they didn't). I don't have an explicit reason for this, but something just doesn't sit right with me about them AT ALL.

Have you ever had this feeling? It isn't the screaming alarm bells I've had whenever someone felt threatening, but it's a feeling of discomfort and not wanting anything to do with them if we cross paths in town.