A recognizable writing style parodying how ChatGPT and similar AI chatbots phrase things — leading with a conclusion, organizing points into tidy bullet-like clauses, opening with stock phrases like "of course" or "in short," peppering in emoji, and hedging claims with "it could be said that..." — treated as an instantly identifiable, slightly uncanny register that people now consciously imitate or mock rather than something that just reads as cold.
REAL-WORLD EXAMPLE
"このメール、めっちゃチャッピー構文で草。「率直に言うと」から始まってる。"
LORE & ORIGIN
Spread as a meme in early 2026 alongside the mainstreaming of ChatGPT-assisted writing: readers began instantly recognizing AI-generated or AI-influenced text by its telltale conclusion-first structure, formal-but-flat tone, opening stock phrases, and habitual hedging language, nicknaming the whole register チャッピー構文 after "Chappy," a common affectionate nickname for ChatGPT in Japanese online culture. What started as a way to call out obviously AI-written text became its own genre of humor, with people deliberately writing in chappi koubun for comic effect or affectionately defending the style as more than just AI smell.
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