沒日沒夜 [没－没－]

Jyutping mut6 jat6 mut6 je6
Pinyin méi rì méi yè

Definitions (CC-CEDICT)
  1. day and night
  2. regardless of the time of day or night
Definitions (Wiktionary)
  1. phrase, idiomatic
    day and night (doing a task)
    (syn.) 無晝無暗, 無暝無日, 无暝无日, 无昼无暗
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）