NO-NO Meaning of NO-NO in English transcription, транскрипция: [ ˈnō-ˌnō ]noun( plural no-no's or no-nos )Date: circa 19421. : something unacceptable or forbidden2. : no-hitter Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003