To raise some eyebrows means to shock or surprise people.
To cause surprise or mild disapproval.
1. Katherine’s style has raised some eyebrows at work lately, miniskirts and all.
2. It’s an issue that ought to raise some eyebrows.
3. My Halloween costume will definitely raise some eyebrows this year.
4. Negotiations held between the two countries regarding weapons have raised some eyebrows.
affect, alarm, amaze, astonish, bewilder, blow away, blow one’s mind, dumbfound, flabbergast, impress, overwhelm, shock, stun, stupefy, surprise