無拘無束 [无－无－]

Jyutping mou4 keoi1 mou4 cuk1
Pinyin wú jū wú shù

Definitions (CC-CEDICT)
  1. free and unconstrained (idiom); unfettered
  2. unbuttoned
  3. without care or worries
Definitions (粵典–words.hk)
  1. 形容詞
    自由​而​唔​受約束
    to be free to do as one likes; free and easy
Definitions (Wiktionary)
  1. phrase, idiomatic
    unrestrained; unconstrained; free and easy
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）