fashionmonger

/ˈfæʃənˌmʌŋɡər/
noun
  1. A person who is overly concerned with or promotes the latest trends in clothing, style, or behavior.
    • The fashionmonger at the party wouldn't stop talking about the newest designer handbags.
    • The magazine hired a fashionmonger to write about the hottest styles each season.
    • She's a bit of a fashionmonger, always buying whatever is trending on social media.
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