The distinctive mannerisms, behaviors, or affected styles characteristic of a dandy (a man excessively concerned with fashion and appearance).
From 'dandy' (origin uncertain, possibly from the name Andrew or Scots 'dandy' meaning nimble) combined with the suffix '-ism' (denoting a distinctive practice or belief) and plural '-s'.
Dandyisms became a major cultural phenomenon in the 18th-19th centuries as a form of social rebellion—well-dressed men used extreme fashion to challenge gender norms and social hierarchies, basically the original influencers.
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