Songfacts®:

• 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."
• Rhett's been using the song to open shows because he says it relaxes everyone. He said: "If you can't just kind of let your guard down and smile and let loose a little bit after you hear that song, then there might be something wrong with you."