Songfacts®:

• This manic song finds Cyrus collaborating with the rapper French Montana (no relation to Hannah). The Moroccan rhymer explained to MTV News how he ended up working with the "Wrecking Ball" singer. "Oh man, I was in L.A. and she happened to be doing the 'Ain't Worried About Nothing' remix for me and she came by the studio," he recalled. "She was letting me hear her album, which is crazy, and we was going through a couple tracks to see which one I fit on."
  
  He continued, "Then she played the 'FU' one and I fell in love with it. We just went in there, we did it. We did it together."
• French explained the song's meaning to MTV News: "It's two letters 'F' [and] 'U.' It's about you just got two letters for somebody when you get down to that [point], you got two words for somebody," he said. "It's just about somebody, when somebody break your heart or something [and] you're in a relationship and it went sour and so you only got two letters for them, 'F' [and] 'U'."