Taivo A Taiwan Mandarin dictionary

打退堂鼓

dǎtuìtánggǔ

ㄉㄚˇ ㄊㄨㄟˋ ㄊㄤˊ ㄍㄨˇ

  1. 1lit. to beat the return drum (idiom)
  2. 2fig. to give up
  3. 3to turn tail

Keep 打退堂鼓 and it comes back until you know it.

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