poster girl
noun North American
A woman who epitomizes or represents a specified quality, cause, etc. an unlikely poster girl for freedom of speech...
- In public, Foreman is a poster girl for the power of positive thinking.
- She found being the poster girl for fat acceptance a lonely business.
- Pip is a poster girl for mother figures with attitude.
Origin
Late 19th century: from the use in print advertisements of good-looking young women and appealing children.