Rhino-cock Share definition Flag This is when you knee someone up the arse (aiming for the bottom of their backbone) just like a rhino cock. When someone is bending over to pick something up shout Rhino-cock and do it. Rhino-cock by Cameron Morgan April 2, 2009 0 0 Get merch Get the Rhino-cock mug. Buy Now — $32.95 See more merch