blue-pencil

From blue +‎ pencil.

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blue-pencil (third-person singular simple present blue-pencils, present participle (US) blue-penciling or (UK) blue-pencilling, simple past and past participle (US) blue-penciled or (UK) blue-pencilled)

1. (transitive) To edit, especially to censor, written documents.
2. (politics, slang) To use a line-item veto.

• red-pencil
• blue pencil doctrine

• pencil-blue