Definition of no-no in English:

no-no

Syllabification: no-no

noun (plural no-nos)

informal
A thing that is not possible or acceptable: perming highlighted hair used to be a definite no-no, but it’s now possible
More example sentences
  • So an office at that end of the building is a definite no-no as the droning hum could drive me mad.
  • That sort of event was a definite no-no and he worked hard to prevent such things.
  • Wiggling out was a definite no-no since he had already made sure that I had nowhere else to turn to.

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