look somebody up and down
look (one) up and down
To visually inspect one in a blatant and often tactless manner. When I stepped into the office, the boss looked me up and down before telling me to take a seat. I looked the strange woman up and down, wondering if she were really here to help me or just another spy.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
look somebody ˌup and ˈdown(informal) openly look at somebody from head to foot in a way that makes them feel embarrassed: When I started working there, I could feel people looking me up and down and wondering what I was like.
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