Definition of pin bullock in English:

pin bullock

noun

Australian
  • Each of a pair of bullocks at the rear of a team pulling a large vehicle.

    ‘I quietly got a stick and kept the pin bullocks up to their job’
    • ‘From pin-bullocks to leaders, every beast was wearied out.’
    • ‘The polers were attached closest to the waggon, with the pin bullocks next.’
    • ‘He took the pin bullocks and the polers and left the rest to the owner.’
    • ‘He stepped in to dig the near-side pin-bullock with the handle of the whip.’
    • ‘Each bullock had a special position in the team — leaders, polers, pin bullocks, and so on.’