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Jyutping co5 laang5 baan2 dang3
Pinyin zuò lěng bǎn dèng

Definitions (CC-CEDICT)
  1. to hold an inconsequential job
  2. to receive a cold reception
  3. to be kept waiting for an assignment or audience
  4. to be out in the cold
  5. to be sidelined
  6. to warm the bench
  7. to cool one's heels
Definitions (粵典–words.hk)
  1. 動詞、俚語
    俾人​忽略​;​俾人​放​喺​一​個​唔​重要​嘅​位置
    to be neglected; to be given an unimportant post; literally: to sit on a cold chair
    • 佢上場比賽嘅表現好差,所以今場要坐冷板凳。
      佢上场比赛嘅表现好差,所以今场要坐冷板凳。
      keoi5 soeng6 coeng4 bei2 coi3 ge3 biu2 jin6 hou2 caa1, so2 ji5 gam1 coeng4 jiu3 co5 laang5 baan2 dang3.
      He performed badly in the last match, so he's given an unimportant post in the current one.
  2. 參看
    坐冷板櫈
Definitions (Wiktionary)
  1. verb, figuratively
    to hold an unimportant post and be neglected; to be sidelined; to be given the cold shoulder
    • 坐穿冷板凳
      坐穿冷板凳
      zuò chuān lěng bǎn dèng
      to be given the cold shoulder throughout
Examples (粵典–words.hk)
  1. Cantonese
    你估佢想喺ball坐冷板凳咩?佢啱啱先食完柠檬嚟咋,重润佢!
    你估佢想喺ball坐冷板凳咩?佢啱啱先食完檸檬嚟咋,重潤佢!
    nei5 gu2 keoi5 soeng2 hai2 bo1 co5 laang5 baan2 dang3 me1? keoi5 ngaam1 ngaam1 sin1 sik6 jyun4 ning4 mung1 lei4 zaa3, zung6 jeon6 keoi5!
    • Do you really think he wants to sit by himself in the ball? He was just rejected, don't rub it in!
  2. Cantonese
    佢上场比赛嘅表现好差,所以今场要坐冷板凳。
    佢上場比賽嘅表現好差,所以今場要坐冷板凳。
    keoi5 soeng6 coeng4 bei2 coi3 ge3 biu2 jin6 hou2 caa1, so2 ji5 gam1 coeng4 jiu3 co5 laang5 baan2 dang3.
    • He performed badly in the last match, so he's given an unimportant post in the current one.