Mississippi Back Wax Share definition Flag The act of sliding down a rocky hill drunk and shirtless removing hair/skin from ones back. Jimbo must've drank too much, he slipped taking a piss and got a Mississippi Back Wax! Mississippi Back Wax by Spencer Bergstrand August 6, 2008 0 0 Get merch Get the Mississippi Back Wax mug. Buy Now — $32.95 See more merch