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Jyutping jyun4 ngaai4 lak6 maa5
Pinyin xuán ㄧㄞˊ lè mǎ

Definitions (Wiktionary)
  1. phrase, idiomatic
    to desist from doing something before it is too late; to pull back before it is too late
    (syn.) 临崖勒马, 臨崖勒馬

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Jyutping jyun4 ngaai4 laak6 maa5
Pinyin xuán yá lè mǎ

Definitions (粵典–words.hk)
  1. 動詞
    喺​情​況​急​轉​直​下​之前​,​及時​停止
    to pull back before it is too late; literally: to stop the horse at the brink of a precipice by pulling its reint
    • 唔好再繼續打劫喇,賺夠喇,懸崖勒馬啦。
      唔好再继续打劫喇,赚够喇,悬崖勒马啦。
      m4 hou2 zoi3 gai3 zuk6 daa2 gip3 laa3, zaan6 gau3 laa3, jyu4 ngaai4 lak6 maa5 laa1.
      It's time for you to stop robbing before it's too late. You've earned enough.
  2. 參看
    臨崖勒馬

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Jyutping jyun4 ngaai4 lak6 maa5
Pinyin xuán yá lè mǎ

Definitions (CC-CEDICT)
  1. lit. to rein in the horse at the edge of the precipice (idiom)
  2. fig. to act in the nick of time
Definitions (粵典–words.hk)
  1. 動詞
    喺​情​況​急​轉​直​下​之前​,​及時​停止
    to pull back before it is too late; literally: to stop the horse at the brink of a precipice by pulling its reint
    • 唔好再繼續打劫喇,賺夠喇,懸崖勒馬啦。
      唔好再继续打劫喇,赚够喇,悬崖勒马啦。
      m4 hou2 zoi3 gai3 zuk6 daa2 gip3 laa3, zaan6 gau3 laa3, jyu4 ngaai4 lak6 maa5 laa1.
      It's time for you to stop robbing before it's too late. You've earned enough.
  2. 參看
    臨崖勒馬
Definitions (Wiktionary)
  1. phrase, idiomatic
    to desist from doing something before it is too late; to pull back before it is too late
    (syn.) 临崖勒马, 臨崖勒馬
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    唔好再继续打劫喇,赚够喇,悬崖勒马啦。
    唔好再繼續打劫喇,賺夠喇,懸崖勒馬啦。
    m4 hou2 zoi3 gai3 zuk6 daa2 gip3 laa3, zaan6 gau3 laa3, jyu4 ngaai4 lak6 maa5 laa1.
    • It's time for you to stop robbing before it's too late. You've earned enough.
Examples (Wiktionary)
  1. Mandarin
    民警说,年轻人在最黄金的年纪就和毒品打交道,无异于在拿自己的人生玩火、走钢丝,稍有不慎就可能万劫不复,民警也希望这次惩戒能让他们悬崖勒马。
    民警説,年輕人在最黃金的年紀就和毒品打交道,無異於在拿自己的人生玩火、走鋼絲,稍有不慎就可能萬劫不復,民警也希望這次懲戒能讓他們懸崖勒馬。
    mín jǐng shuō , nián qīng rén zài zuì huáng jīn de nián jì jiù hé dú pǐn dǎ jiāo dào , wú yì yú zài ná zì jǐ de rén shēng wán huǒ , zǒu gāng sī , shāo yǒu bù shèn jiù kě néng wàn jié bù fù , mín jǐng yě xī wàng zhè cì chéng jiè néng ràng tā men xuán yá lè mǎ .
    • The police says that for teens in their prime age, coming into contact with drugs is no different from playing with fire or walking a tightrope and risking their lives. One small mistake could lead to lifelong doom. The police also hopes that this discplinary action can urge them to pull back before it is too late.