兩肋插刀

1. • to take knives in both sides (idiom)

     lit.

2. • to go to any lengths for a friend to sacrifice oneself out of loyalty

     fig.

Character by character

• 兩(liǎng)two
• 肋(lèi)rib
• 插(chā)insert
• 刀(dāo)surname Dao