敗水軍師 [败－军师]

Jyutping baai6 seoi2 gwan1 si1
Pinyin bài shuǐ jūn shī

Definitions (CC-CANTO)
  1. to describe someone who give others advice / help others to make plans but these always turn out to be unsuccessful
Definitions (粵典–words.hk)
  1. 名詞
    指一個​人​提建議​畀​人​，​但​係​成日​都​失敗​，​誤導​咗​人​哋
    an incompetent adviser