This should explain mine......
http://en.wikipedia.org/wiki/The_Adventure_Game
"Rongad (series 3 & 4), because he was Australian, spoke English backwards and could only understand the contestants if they did the same. His Australian accent was a mild clue to help the contestants realise he was speaking backwards. Noted for habitually singing Waltzing Matilda in reverse, and exclamations of "Doog yrev!" when the contestants did well."
Being a child of the 80's I used to watch this and the name just stuck.... though I am not known to sing Waltzing Matilda...ever.... unless you want your ears to start bleeding from the unholy sound that I would be making