My mother’s father always said this when he wanted his knapsack type bag which he carried in the woods packed with a lunch. Nunnie bag was the term which all the old people of St. Jones Without used for such a bag. The nunnie bag was only for going in the woods, not taken out in the punt. (A bread box was taken out in the punt to keep the fishermen’s lunch in.)
Source: Clifford Brown, for a Folklore course at MUN, 1971