壓倒駱駝的最後一根草 [压－骆驼－－后－－－]

Jyutping aat3 dou2 lok3 to4 dik1 zeoi3 hau6 jat1 gan1 cou2
Pinyin yā dǎo luò tuo de zuì hòu yī gēn cǎo

Definitions (Wiktionary)
  1. phrase, idiomatic
    the straw that broke the camel's back