Redditor Ravi emphasizes that he is not from Australia. He's from Texas. But Australia is basically British Texas, so that's close enough.
Anyway, as an honorary Australian, he makes boomerangs, including an axe-shaped boomerang, a Batarang (Batman's throwing weapon), and a whistling boomerang. Perusing his Reddit profile is very educational. I learned that there are left and right-handed boomerangs.
Javi's most recent creation is this one shaped like a kangaroo. So it's a kangarang or a kangarooarang. I suppose that it could be used to hunt kangaroos in Australia, which would be appropriate, as that was one of the original purposes of the boomerang.