Peace Up Share definition Flag A cool way of sayin goodbye to your homeboys or homegirls. Popularised by the song 'Yeah' by Usher, "Peace up A town." 1: "Ay yo im out of here man c ya laterz." 2: "Aight man peace up." Peace Up by Kenno July 18, 2006 0 0 Get merch Get the Peace Up mug. Buy Now — $32.95 See more merch