Definition of poster child in English:

poster child

Syllabification: post·er child
(or poster boy or poster girl)

noun

North American
A person or thing that epitomizes or represents a specified quality, cause, etc. the organization is the poster child for bad business deals
More example sentences
  • We made him a poster boy for bad behavior, put him all over newspapers and milk cartons, and now we should go out and get him.
  • Someone is sure to nail you against the wall and call you the poster boy for Bloggers Gone Bad if you do.
  • Were there an Over-Clickers Anonymous, I could be their poster child.

Origin

1930s: from the use of appealing children in charitable print advertisements.

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Word of the day erroneous
Pronunciation: ɪˈrəʊnɪəs
adjective
wrong; incorrect