Lake Effect Kid is the ninth extended play (EP) by American rock band Fall Out Boy, released on August 23, 2018, through Island and DCD2. It is the band's second EP, and third studio release overall, to be released in 2018 following their seventh studio album Mania and eighth EP, Llamania, the latter which was released under the moniker Frosty and the Nightmare Making Machines. The EP is the first release to feature Sean O'Keefe credited as producer since the band's EP, My Heart Will Always Be the B-Side to My Tongue (2004). It consists of one re-recorded track, "Lake Effect Kid", which was originally released on the group's 2008 mixtape Welcome to the New Administration, and two unreleased tracks. The EP also sees a return to the band's older pop punk sound.