Roo Poo Share definition Flag Nickname given to person who wipes his finger in kangaroo shit to determine the contents of the liquid substance on the back of a bus in Australia. God Heflin why the fuck did you wipe your finger in kangaroo shit? You're such a Roo Poo! Roo Poo by g6042 November 2, 2010 0 0 Get merch Get the Roo Poo mug. Buy Now — $32.95 See more merch