poster child
noun/ˈpəʊstə tʃaɪld/
/ˈpəʊstər tʃaɪld/
(also poster boy, poster girl)
(especially North American English)- a child with a particular illness or other problem whose picture appears on a poster advertising an organization that helps children with that illness or problem
- (often humorous) a person who is seen as representing a particular quality or activity
- She is the poster child for incompetent government.
- He was the poster boy for indie rock.
Check pronunciation:
poster child