Definition of lucky minnie in English:

lucky minnie

noun

Shetland, Orkney, Scottish
rare
  • One's grandmother; a grandmother.

Origin

Mid 18th century; earliest use found in Robert Forbes (bap. 1708, d. 1775), Jacobite annalist and Scottish Episcopal bishop of Ross and Caithness. From lucky + minnie.

Pronunciation

lucky minnie

/ˈlʌkɪ ˌmɪni/