Someone who is the perfect fit for a stereotype.
That girl who says "like, omg" all the time is the poster child for a Valley Girl.
A person who is an example of something.
Though Jerry was reckless, he somehow always prevailed due to dumb luck. When they say "Fortune favours the foolish", Jerry was the poster child.
A verb derived from the phrase poster child
. To make an example of someone or something through the application of an unfair double standard
I'm not the only person who has gained 20 pounds. Stop poster-childing me!
an insult, likening someone to one of the children on the Jerry Lewis promotional poster for his telethon. aka: Jerry's Kid
That dude needs help, that friggin' poster child.