摸爬滾打 [－－滚－]

Jyutping mo2 paa4 gwan2 daa2
Pinyin mō pá gǔn dǎ

Definitions (CC-CEDICT)
  1. to go through challenging experiences
  2. to become seasoned (in one's profession etc)
Definitions (Wiktionary)
  1. phrase, idiomatic
    to go through arduous training or hard work