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View synonyms for no-no

no-no

[ noh-noh ]

noun

, Informal.
, plural no-nos, no-no's.
  1. anything that is forbidden or not advisable, as because of being improper or unsafe:

    If you want to lose weight, rich desserts are a no-no.

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Word History and Origins

Origin of no-no1

1940–45, Americanism; reduplication of no 1

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