mungo

noun1

1. •
   A material of short fiber and inferior quality obtained by deviling woollen rags or the remnants of woollen goods, specifically those of felted, milled, or hard-spun woollen cloth, as distinguished from shoddy, or the deviled product of loose-textured woollen goods or worsted.

   • Tailors' clippings and remnants of fine woollen goods, such as broadcloth, etc., are devilled and spun into yarn for making cloth of nicer quality, called mungo. — 1918