\ ˈnō-ˌnō
\
\
plural no-no's or no-nos
Definition of no-no
1
: something unacceptable or forbidden
2
: no-hitter
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“No-no.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/no-no. Accessed 26 May. 2022.
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The first known use of no-no was circa 1942
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