Petting the White Rhino Share definition Flag a slang term used for doing cocaine through the rectum. "Dave Breedlove likes Petting the White Rhino while on holiday in Caracas." Petting the White Rhino by Cris Cotner May 28, 2008 0 0 Get merch Get the Petting the White Rhino mug. Buy Now — $32.95 See more merch