用to fall on your sword表达“承担责任”

fall on your sword 的字面意思是“摔倒在自己的剑上”，实际要表达的含义是某人为一组人的行动造成的不良后果承担责任。

• He doesn‘t think he‘s to blame – but he‘s falling on his sword anyway.
• She‘s going to resign – she‘s falling on her sword even though it‘s not her fault.
• He is the boss – it‘s only right he‘s falling on his sword this time.

值得注意的是，另一个意思相似的短语是 to take some flak – 受到很多批评。

• She always takes some flak for things. Even when it‘s not her fault.