滯雞 [滞鸡]

Jyutping zai6 gai1
Pinyin zhì jī

Definitions (CC-CANTO)
  1. dumb; incompetent; lack of insight
Definitions (粵典–words.hk)
  1. 形容詞
    遲鈍​、​唔​靈活​、​笨頭​笨腦
    slow; obtuse; stupid