未學行先學走 [－学－－学－]

Jyutping mei6 hok6 haang4 sin1 hok6 zau2
Pinyin wèi xué xíng xiān xué zǒu

Definitions (CC-CANTO)
  1. (proverb with figurative meaning) someone is arrogant
Definitions (粵典–words.hk)
  1. 語句
    做​嘢​唔​按部就班​，​急​於​求成​，​基礎​未​打​好​就​想​學進​階​嘅​嘢
    talk the talk before walk the walk