A follower or advocate of Fletcherism; someone who practices the thorough chewing technique promoted by Horace Fletcher.
From 'Fletcher' (the person) plus the '-ite' suffix (meaning a follower or believer). This was a common way to name adherents of early 20th-century health movements and dietary trends.
Fletcherites became a real social movement among the wealthy elite of the 1910s-1930s—you'd see them at dinner parties ostentatiously counting their chews while others ate normally. It's a perfect example of how pseudoscience can become fashionable among people with money and time.
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