poster_child
1. [ noun ] a child afflicted by some disease or deformity whose picture is used on posters to raise money for charitable purposes
Examples:

"she was the poster child for muscular dystrophy"

Related terms: child poster_girl poster_boy
Similar spelling:   poster_girl
  poster_color
  poster_board
  posterity
  posterior
  poster_colour
  posterboard
  poster_boy
  posteriority
  poster_paint