raise your eyebrows

US /reɪz jʊər ˈaɪˌbraʊz/
UK /reɪz jʊər ˈaɪˌbraʊz/
"raise your eyebrows" picture
1.

to show surprise or disapproval by moving your eyebrows upwards

:
She couldn't help but raise her eyebrows at his outrageous suggestion.
The news that he was getting married made everyone raise their eyebrows.