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Rule "missing hyphen in 'drop dead'"

This is one of many errors that LanguageTool can detect.

Description: missing hyphen in 'drop dead'
Message: The adjective or adverb <suggestion>\1-\2</suggestion> is normally spelled with a hyphen.
Category: Compounding (ID: COMPOUNDING)
Link: https://languagetool.org/insights/post/hyphen/#compound-adjectives-with-hyphens
Incorrect sentences
that this rule can detect:
  • I'm drop dead tired.
    Correction suggestion: drop-dead
Correct sentences
for comparison:
  • Why don't you just drop dead?
  • Nice to see you didn't drop dead, following.
  • Drop dead!
ID: DROP_DEAD_HYPHEN [1]
Version: 6.8-SNAPSHOT (2025-11-02 22:33:08 +0100)