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Jyutping syut3 bat1 gwo3 heoi3
Pinyin shuō bu guò qù

Definitions (Wiktionary)
  1. adj, idiomatic
    to be unable to explain away; cannot justify morally

說不過去 [说-过-]

Jyutping
Pinyin shuō bu guò qù

Definitions (CC-CEDICT)
  1. cannot be justified
  2. inexcusable