Definition of cattle-duff in English:

cattle-duff

verb

[no object]Australian, NZ
  • Steal cattle.

    ‘here they'd once cattle-duffed by starlight’
    • ‘They're bound to visit lightly sins on those who cattle-duff.’
    • ‘She had faked the brands and cattle duffed.’
    • ‘He may also have been cattle duffing with his stepfather.’

Origin

Late 19th century: from cattle + duff ‘steal and alter brands on cattle’.