Dictionaria -

viavia mamdeuko feather money: an artifact used by neighbouring Santa Cruz [...]

Part of Speech	noun
Morphology	viavia ‘hair, feathers’ + mamdeuko ‘Honeyeater’

feather money: an artifact used by neighbouring Santa Cruz islanders as their traditional money. Takes the form of a red belt, made with the red feathers of the Honeyeater bird.

Literally	feathers of Honeyeater
Infobox	Feather money in Santa Cruz: “The people of Santa Cruz (Niteni) make their money using the feathers of a red bird called ‘mamdeuko’, Cardinal honeyeater. They use breadfruit sap to glue those feathers to a piece of wood. That traditional form of money, they call it ‘noviapu’.”