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Jyutping cing1 saan1 zau2 faan2
Pinyin qīng shān zǒu fàn

Definitions (粵典–words.hk)
  1. 語句
    指​眼前​人​言行​失常​、​精神​有異​;​「​青山​」​指​香港​最大​嘅​精神科​醫院​青山​醫院
    means someone here is insane; literally, a patient escaped from Castle Peak (a psychiatric hospital in Hong Kong)
    • 好心少少事就咪大吵大鬧啦,一陣隔籬屋以為青山走犯呀。
      好心少少事就咪大吵大闹啦,一阵隔篱屋以为青山走犯呀。
      I urge you not to be so rowdy on such a small matter, or the neighborhood would think if someone is insane here.
Examples (粵典–words.hk)
  1. Cantonese
    好心少少事就咪大吵大闹啦,一阵隔篱屋以为青山走犯呀。
    好心少少事就咪大吵大鬧啦,一陣隔籬屋以為青山走犯呀。
    • I urge you not to be so rowdy on such a small matter, or the neighborhood would think if someone is insane here.
Examples (Wiktionary)
  1. Cantonese
    青山走犯
    青山走犯
    cing1 saan1 zau2 faan2
    • a psychopath (literally, “an escaped criminal from the Castle Peak hospital”)