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Jyutping daai6 laam6 dou1 ce2 m4 maai4
Pinyin dà lǎn dōu chě wú mái

Definitions (粵典–words.hk)
  1. 語句
    比喻​兩者​毫不​相關​;​風馬牛​不​相及
    to imply that one thing is totally different from another; literally: one thing is so distant from another that they cannot be bound together by some huge mooring-rope
    • 我同佢大纜都扯唔埋,冇乜嘢好傾。
      我同佢大缆都扯唔埋,冇乜嘢好倾。
      ngo5 tung4 keoi5 daai6 laam6 dou1 ce2 m4 maai4, mou5 mat1 je5 hou2 king1.
      I am completely different from him, so we have almost nothing to talk about.
  2. 近義詞
    南轅北轍、話不投機半句多
Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    to have no relationship with each other whatsoever; to be totally irrelevant
    (syn.) 风马牛不相及, 風馬牛不相及

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Jyutping daai6 laam6 dou1 ce2 m4 maai4
Pinyin dà lǎn dōu chě n2 mái

Definitions (CC-CANTO)
  1. two things/ people are so not relevant; two things/ people have absolutely no relationship / correlation with each other whatsoever
Examples (粵典–words.hk)
  1. Cantonese
    我同佢大缆都扯唔埋,冇乜嘢好倾。
    我同佢大纜都扯唔埋,冇乜嘢好傾。
    ngo5 tung4 keoi5 daai6 laam6 dou1 ce2 m4 maai4, mou5 mat1 je5 hou2 king1.
    • I am completely different from him, so we have almost nothing to talk about.
  2. Cantonese
    大缆都扯唔埋
    大纜都扯唔埋
    daai6 laam6 dou1 ce2 m4 maai4
    • to imply that one thing is totally different from another; literally: one thing is so distant from another that they cannot be bound together even by a huge mooring-rope