It girl

American  

Or it girl

noun

1. a young woman with sex appeal and a magnetic personality.

2. an extremely popular and attractive young socialite or celebrity.

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It girl British  

noun

1. a rich, usually attractive, young woman who spends most of her time shopping or socializing

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Etymology

Origin of It girl

The nickname given to the sex symbol Clara Bow, subject of the 1927 novel and movie It , written by Elinor Glyn, who popularized the concept of it ¹ in the slang sense “sex appeal”