In film and literature, a male character who is depicted as a cute, quirky free spirit, and who is used solely or primarily to be the love interest of and further the personal growth of the (often disillusioned or depressed) female protagonist, rather than being a fully realized character. The term is an adaptation of "manic pixie dream girl," first used by film critic Nathan Rabin in 2007. I don't know if I agree with the assertion that Augustus Waters is a manic pixie dream boy.