floppy dingo Share definition Flag a non-erect penis, very common in sporting events, when the penis is uncontrollably flopping around. At yesterday's game, my Floppy Dingo was getting in the way of my three point shot. floppy dingo by "Cronky" December 27, 2008 0 0 Get merch Get the floppy dingo mug. Buy Now — $32.95 See more merch