Penned by Robert Plant with his guitarist Robbie Blunt and keyboardist Jezz Woodroffe, this features an early use of a drum machine. The ex Led Zeppelin frontman recalled to American Songwriter magazine in 2018:
"I had the first Roland drum machine, which was before the TR808. I wrote a track called 'Fat Lip' with it and thought I'd died and gone to heaven. I thought, I've made it! I've slipped right the way through all that stuff that went on forever and ever, and here I am singing into a drumbox, which is about twelve inches cubed. It's not very sexy, I must say in comparison to John Bonham. But I thought it was great."