A person who composes, speaks, or specializes in apothegms; someone known for making pithy and memorable wise sayings.
From apothegm plus the suffix -ist (meaning one who practices or specializes in). The suffix -ist creates agent nouns denoting people who do a particular activity.
An apothegmatist is basically a professional quote machine—think of ancient philosophers who were famous for saying clever things in the fewest words possible, kind of like Oscar Wilde or Mark Twain of their time!
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