raise eyebrows

(verb) to cause surprise or disapproval

Example Sentences:

Brother: I don’t think you should tell dad about your new boyfriend.
Sister: Why not?
Brother: Because you’re 20 and he’s 45. I think your relationship might raise eyebrows.
Sister: I don’t care! We’re in love!

The drunk employee’s actions at the party raised eyebrows. Now the boss wants to talk to him.

The sexy outfit that the beautiful woman is wearing is really raising eyebrows!