The term "manic pixie dream girl" has become so embedded into our cultural lexicon that at this point, it's hard to imagine we ever lived in a time when it didn't exist. But we did and in some ways, it was a simpler time. Now the man who invented the term would like to apologize for creating it.
A refresher: The Manic Pixie Dream Girl (MPDG) archetype was coined by Nathan Rabin in The A.V. Club (he now writes for The Dissolve) for a 2007 essay he wrote about the 2005 Cameron Crowe movie Elizabethtown. Since then, the term has become ubiquitous and, according to an essay Rabin has published in Salon, dangerously so.