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NUCFLASH

[nook-flash, nyook-]
noun
  1. a report of highest precedence notifying the president, secretary of defense, or their deputies of an accidental or unauthorized nuclear-weapon launch or of a nuclear attack.
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Origin of NUCFLASH

nuc(lear) flash
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018