爛躂躂 [烂跶跶]

Jyutping laan6 daat3 daat3
Pinyin làn dá dá

Definitions (粵典–words.hk)
  1. 形容詞
    衣着打扮​、​行為​唔​正經​、​唔​得體​、​唔​莊重
    (of appearance, dressing, behaviour) too casual; too informal; too indecent