draff draff /dræf/

noun

1. The residue of malt and grain which remains in the mash-kettle after the mashing and lautering process.  ( brewer's grain , draff , spent grain )
   the residue of malt and grain which remains in the mash-kettle after the mashing and lautering process.
    As it mainly consists of carbohydrates and proteins, and is readily consumed by animals, spent grain is used in animal feed.
   As it mainly consists of carbohydrates and proteins, and is readily consumed by animals, spent grain is used in animal feed.