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Jyutping bat1 zuk1 wai4 ngoi6 jan4 dou6
Pinyin bù zú wèi wài rén dào

Definitions (Wiktionary)
  1. phrase, idiomatic
    not fit to be told to others; no need to tell others; this is not to be mentioned to outsiders; this is strictly between ourselves

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Jyutping bat1 zuk1 wai4 ngoi6 jan4 dou6
Pinyin bù zú wéi wài rén dào

Definitions (CC-CEDICT)
  1. no use to tell others
  2. let's keep this between ourselves (idiom)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    不足为外人道
    不足為外人道
    bù zú wèi wài rén dào
    • not worth saying to outsiders