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Jyutping bat1 je6 sing4
Pinyin bù yè chéng

Definitions (粵典–words.hk)
  1. 名詞
    形容​一個​地方​好​繁華熱鬧​,​到​夜晚​都​燈火​通明​,​人來​人往​。
    city that never sleeps, used to describe a bustling place where the lights are still on and there are still many people at night.
    • 澳門咁多賭場、酒店,到四點都仲好嘈好熱鬧,話係不夜城真係當之無愧。
      澳门咁多赌场、酒店,到四点都仲好嘈好热闹,话系不夜城真系当之无愧。
      Macau has so many casinos and hotels, and it's still very noisy and crowded at 4 in the morning, it totally deserves its name as a "city that never sleeps".
Definitions (Wiktionary)
  1. noun
    city that never sleeps; nightless city (Classifier: 座 m)
  2. noun
    nighttime entertainment quarter (Classifier: 座 m)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    澳门咁多赌场、酒店,到四点都仲好嘈好热闹,话系不夜城真系当之无愧。
    澳門咁多賭場、酒店,到四點都仲好嘈好熱鬧,話係不夜城真係當之無愧。
    • Macau has so many casinos and hotels, and it's still very noisy and crowded at 4 in the morning, it totally deserves its name as a "city that never sleeps".