masticator

noun

1. Someone who masticates.

   “If we can take the liberty of reducing Govani's clever phrasing and paper-thin beards to plain English, Linda Evangelista is a simpleton, Margaret Atwood is a pretentious bore and Angelina Jolie is a goat-like masticator.”

   “We encourage their singing as much as we can," said the brother of the proprietor, himself a diligent masticator of the weed, who attended us, and politely explained to us the process of making plug tobacco; "we encourage it as much as we can, for the boys work better while singing.”

2. A machine for cutting meat into fine pieces for toothless people.
3. A machine for cutting leather, India rubber, or similar tough substances, into fine pieces, in some processes of manufacture.