Wiktionary
nap sack
alt. (misspelling of knapsack English) n. (misspelling of knapsack English)
Usage examples of "nap sack".
Over the most persistent of their pursuers Peter flung the Nap Sack and, as he fell snoring by the roadside, Grumpy sent the second flying into a ditch.
As the furious creature rushed at the Patchwork Girl, Peter threw the Nap Sack over his head.