raise an eyebrow

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Related to raising an eyebrow: raise some eyebrows

raise an eyebrow

To show confusion, surprise, concern, or disapproval, either literally (often by actually raising an eyebrow) or figuratively. When I told my mom how much money we would need, she raised an eyebrow and asked me to add it up again. You need to stop coming in late every day—the boss is starting to raise an eyebrow. My grandmother definitely raised an eyebrow when I stopped going to church.
See also: eyebrow, raise