Question

Raise an Eyebrow to surprise or shock people by doing or saying something outrageous; to cause somebody to show disapproval in his or her facial expression

Accepted Answer

It raised quite a few eyebrows when Sara showed up with her hair dyed purple and green. This fairly modern idiom represents what happens to a lot of people's faces when they see something that really startles them: They raise their eyebrows. This expression can suggest a person's emotional reaction to something surprising or shocking, even if it doesn't show on his or her face.

Idiom	Raise an Eyebrow
Example	It raised quite a few eyebrows when Sara showed up with her hair dyed purple and green.
Meaning	to surprise or shock people by doing or saying something outrageous; to cause somebody to show disapproval in his or her facial expression
Origin	This fairly modern idiom represents what happens to a lot of people's faces when they see something that really startles them: They raise their eyebrows. This expression can suggest a person's emotional reaction to something surprising or shocking, even if it doesn't show on his or her face.

Raise Show Expression Eyebrow Raised Sara Showed Hair