Thomas Rhett penned this with "Crash and Burn
" writer Chris Stapleton and his producer Jesse Frazier. The song is named for a body region, which Rhett asks us to shake like salt and pepper. He recalled to the Las Vegas Review Journal
: "I remember getting out of my bunk on the bus, to this crazy beat and Chris up in the front lounge singing this chorus, saying, 'People on the left, people on the right, shake your south side.' It's never a side that I've ever seen of Chris. It just seemed so fun, man. And basically, it's a country wobble, is what it is."