American Beauty/American Psycho (sometimes abbreviated as AB/AP) is the sixth studio album by American Pop rock band Fall Out Boy, released on January 16, 2015 through Island Records as the follow-up to the band's comeback album Save Rock and Roll (2013). The band wrote music while on tour with Paramore mid-2014 and it developed into a new album.

The album's release was preceded by the 8× Platinum top 10 lead single "Centuries", released September 9, 2014 while the album was still being completed. The album's title track was released as the second single in the UK on December 15, 2014, receiving a radio premiere a month before on November 24, 2014. American Beauty/American Psycho debuted at No. 1 on the US Billboard 200 album chart, with 218,000 album-equivalent units in its first week alone and becoming the band's third No. 1 album, later being certified gold in the UK and Canada. On March 1, 2016, the album was certified platinum in the US for 1 million units.

In support of the record, Fall Out Boy played at Soundwave in Australia, made TV appearances, and embarked on three concert tours: the American Beauty/American Psycho Tour, the North American leg of which was named The Boys of Zummer Tour and featured rapper Wiz Khalifa as co-headliner, and the Wintour is Coming tour. On October 30, a remix album entitled Make America Psycho Again was released with a different rapper on each song, which drew in over 13,000 equivalent copies in its debut week.