Definition of yam stick in English:

yam stick

noun

Australian
  • An Aboriginal implement used for lifting crops and digging, consisting of a piece of wood sharpened at both ends.

    ‘little girls are instructed in the use of the yam stick, with which the roots are dug up’
    • ‘Down goes the yam stick, and up comes the potato, which is at once put in to the bag.’
    • ‘He hit old Fred on the head with a yamstick.’
    • ‘She gathered together her possessions including her yamstick and left.’
    • ‘The yams should be sunk way down in the ground, so that they could only be obtained by hard digging, with a yamstick.’
    • ‘She dug a large hole in the ground, which at once filled with water, in the bottom of which she could feel the mouth of some animal with her yamstick.’

Origin

Mid 19th century: from its use in planting yams, a staple Aboriginal foodstuff.