Taivo A Taiwan Mandarin dictionary

狐狸尾巴

húliwěiba

ㄏㄨˊ ˙ㄌㄧ ㄨㄟˇ ˙ㄅㄚ

  1. 1lit. fox's tail (idiom); visible sign of evil intentions
  2. 2to reveal one's evil nature
  3. 3evidence that reveals the villain

Keep 狐狸尾巴 and it comes back until you know it.

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