give one the eye
give one the eye {v. phr.}, {slang}
1. To look at, especially with interest and liking.
A pretty girl went by and all the boys gave her the eye.
2. To look or stare at, especially in a cold or unfriendly way.
Mrs. Jones didn't like Mary and didn't speak. She just gave her the eye when they met on the street.
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Source: A Dictionary of American Idioms