Hump by a Rhino Share definition Flag The thrusting of someones knee into another persons anus. Dude! Did you see me give that mail room clerk a Hump by a Rhino? I think I broke the mans butt! Hump by a Rhino by CatSEWER October 18, 2009 0 0 Get merch Get the Hump by a Rhino mug. Buy Now — $32.95 See more merch