兩肋插刀 [两－－－]

Jyutping loeng5 lak6 caap3 dou1
Pinyin liǎng lèi chā dāo

Definitions (CC-CEDICT)
  1. lit. knifes piercing both sides (idiom)
  2. fig. to attach a great importance to friendship, up to the point of being able to sacrifice oneself for it