無術 [无术]

Jyutping mou4 seot6
Pinyin wú shù

Definitions (Wiktionary)
  1. verb
    to lack skill
  2. verb
    to have no method
Examples (粵典–words.hk)
  1. Cantonese
    大家见到佢有几不学无术啦。
    大家見到佢有幾不學無術啦。
    daai6 gaa1 gin3 dou2 keoi5 jau5 gei2 bat1 hok6 mou4 seot6 laa1.
    • Now you guys see how ignorant and incompetent he is.