两肋插刀

两肋插刀

liǎng lèi chā dāo

help (one's friend) at the loss of one's life

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兩肋插刀|两肋插刀 [liǎng lèi chā dāo] ► lit. knifes piercing both sides (idiom) ► fig. to attach a great importance to friendship, up to the point of being able to sacrifice oneself for it