from The Century Dictionary.
- noun A pitch common in the Bay of Honduras and there used to paint vessels' bottoms as a protection against marine worms.
Sorry, no etymologies found.
On the way, they visited all the sandy bays of the coast to look for "munjack," "a sort of Pitch or Bitumen which we find in Lumps."
On the Spanish Main Or, Some English forays on the Isthmus of Darien. John Masefield 1922