"Filthy" is a song by American singer Justin Timberlake from his fifth studio album, Man of the Woods (2018). It is the opening track on the album and was released as its lead single on January 5, 2018, through RCA Records. Timberlake wrote and produced the song alongside Timbaland and Danja, with James Fauntleroy and Larrance Dopson providing additional songwriting. It was also recorded at Conway Recording Studios, based in Hollywood, Los Angeles. The song is an electro-funk and R&B tune in the key of G major that comprises funky electro-R&B elements.