auld yin, old yin noun
1 (a sometimes) affectionate term of address to an older person; a nickname for a person who is not necessarily very old: Give us [me] the soap please, auld yin. 20-.
2 one’s father or mother 20-.
3 in plural ancestors, the ancient ones: My mother even tied her washing line between two of the highest trees on the Balnaguard Pictish barrow. .... ‘Ye can tell the auld yins breathed on my washing; it’s as soft as butterfly wings. 20-. etymology: Scots: auld ‘old’+ yin ‘one’; attested by JS and BW