English version

no-no

From Longman Dictionary of Contemporary Englishno-noˈno-no noun [singular] informal  NOT DO somethingsomething that you must not do because it is considered to be unacceptable behaviour Colouring your hair was a no-no at that time.
Examples from the Corpus
no-noEarrings and heavy chains around the neck are a no-no on the field.Handwritten signs in the restaurant are a no-no.The use of fresh ground beef is a no-no.Apparently, this is a no-no in insurance land.In technical terms, this is a big no-no.And crying for me was a big no-no in business life.A word of warning, though-counters are generally considered a design no-no.There is lots of touching, and I think touching, in our society, is a real no-no.
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