The Collaborative International Dictionary of English v.0.48:

Waddy \Wad"dy\, n.; pl. Waddies. [Written also waddie,
   whaddie.] [Native name. Thought by some to be a corrup. of
   E. wood.] [Australia]
   1. An aboriginal war club.
      [Webster 1913 Suppl.]

   2. A piece of wood; stick; peg; also, a walking stick.
      [Webster 1913 Suppl.]