milky roo Share definition Flag The act of having a bath of milk with a kangaroo then indulging in sexual acts, possibly an anal toss.. shit dan check dis ben i was soo off mi neck d ova nyt ended up avin a milky roo .. milky roo by GSG December 12, 2008 0 0 Get merch Get the milky roo mug. Buy Now — $32.95 See more merch