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Jyutping fo2 ce1 mei6 dou3 zaam6
Pinyin huǒ chē wèi dào zhàn

Definitions (CC-CANTO)
  1. (noun) Train not yet arrives the station
Definitions (粵典–words.hk)
  1. 語句、俚語
    褲鏈​未拉到​頂
    to have one's trousers (partly) unzipped; to have one's fly down; "to be flying without a license"; literally, train not yet arrived at the station
    • 喂,你火車未到站喎,去廁所搞搞佢先啦,陣間仲要見客㗎!
      喂,你火车未到站㖞,去厕所搞搞佢先啦,阵间仲要见客㗎!
      wai3, nei5 fo2 ce1 mei6 dou3 zaam6 wo3, heoi3 ci3 so2 gaau2 gaau2 keoi5 sin1 laa1, zan6 gaan1 zung6 jiu3 gin3 haak3 gaa3!
      Hey, your fly is down. Go fix it in the bathroom, we're going to meet some clients soon!
Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    to have one's trousers unzipped; to have one's fly down
Examples (粵典–words.hk)
  1. Cantonese
    喂,你火车未到站㖞,去厕所搞搞佢先啦,阵间仲要见客㗎!
    喂,你火車未到站喎,去廁所搞搞佢先啦,陣間仲要見客㗎!
    wai3, nei5 fo2 ce1 mei6 dou3 zaam6 wo3, heoi3 ci3 so2 gaau2 gaau2 keoi5 sin1 laa1, zan6 gaan1 zung6 jiu3 gin3 haak3 gaa3!
    • Hey, your fly is down. Go fix it in the bathroom, we're going to meet some clients soon!