兩肋插刀 (loeng5 lak6 caap3 dou1) — to attach a great importance to friendship, up to the point of being able to sacrifice oneself for it (lit., "knifes piercing both sides") in Cantonese
loengˏ₅兩lakˍ₆肋caap˗₃插douˉ¹刀简 两肋插刀
Mandarin Pinyin: liang3 lei4 cha1 dao1
Meaning of 兩肋插刀
nounto attach a great importance to friendship, up to the point of being able to sacrifice oneself for it (lit., "knifes piercing both sides")