The crossword solution for the term GENRE OF FALL OUT BOY is EMO, which stands for 'emotional hardcore'. Emo is a genre of rock music that originated in the mid-1980s and was popularized in the early 2000s. It is characterized by emotional lyrics, melodic instrumentation, and an emphasis on personal expression. Fall Out Boy is an American rock band from Wilmette, Illinois, formed in 2001. They are considered to be one of the most successful emo bands of all time, having sold over 8 million albums worldwide.