thumbperiod
/ˈθʌmˌpɪəriəd/nounVerified NewA thumbs-up reaction used as a conversational full stop — acknowledgment, closure, and disengagement in one tap.
The reaction ends threads without the cost of words, and everyone learns its grammar: the thumbs-up can mean "received," "agreed," or "this conversation is over." Thumbperiod is punctuation migrated into gestures.
Etym. — *thumb* + *period*; a punctuation mark with a fingerprint on it.
Rel. — dotdotdread
Novelty check: NEW · checked 2026-11-08
review evidence: wordstoreview/review-batch-3-03-tech.md
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Method: Editorial batch review — per-word exact-form web search (WebSearch/Tavily) per docs/REVIEW-criteria.md §2