窮鼠齧狸 [穷－啮－]

Jyutping kung4 syu2 nget6 lei4
Pinyin qióng shǔ niè lí

Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    a cornered rat will bite a cat, weak people will attack when cornered
    (syn.) 困獸猶鬥, 狗急跳墙, 狗急跳牆, 窮鼠齧貓, 穷鼠啮猫, 困兽犹斗