膽大妄為 [胆－－为]

Jyutping daam2 daai6 mong5 wai4
Pinyin dǎn dà wàng wéi

Definitions (CC-CEDICT)
  1. daring
  2. presumptuous
  3. daredevil
Definitions (粵典–words.hk)
  1. 形容詞
    好大膽​、​好​冇​顧忌​咁​做​啲​唔​恰​當​嘅​嘢
    bold and reckless; daredevil