A quaint but usefull Australian term of excitement. Mostly used by Australian men over the age of 80 and only after a good lie down before 3pm. Etymology uncertain but was in common usage before Twitter.
DAVE: What's that you've got there Bob?
BOB: It's a new device what I got that that wakes me up at 8 o'clock, boils the kettle and pours me a cup of tea.
DAVE: Whackothadidlio!
BOB: It's a new device what I got that that wakes me up at 8 o'clock, boils the kettle and pours me a cup of tea.
DAVE: Whackothadidlio!
