Homonym: The Duff (Slang)
"The Duff" is a young adult novel written by Kody Keplinger, published in 2010. The story follows Bianca Piper, a high school senior who discovers that she has been labeled as the "Designated Ugly Fat Friend" among her more attractive friends. Struggling with her self-image and social status, Bianca navigates the challenges of adolescence, friendship, and romance.
The novel explores themes of identity, self-acceptance, and the pressures of societal beauty standards. It was adapted into a film in 2015, starring Mae Whitman as Bianca and Robbie Amell as Wesley, which further popularized the story and its messages about self-worth and friendship.