在英文中，人们用“punchbag（沙袋）”比喻发泄怒气的对象，而中文里也有类似的表达。

“出气筒”，指无充分的理由或恰当的原因而被人当做发泄怒火的“工具”。“出气”，字面意思是“排放空气（air-out）”，引申含义为“发泄气愤（give vent to one's anger）”。常见表达为“把某人当成出气筒（use somebody as a punchbag）”。

例句：

我又没得罪你，别拿我出气。

I'm not the one who offended you. Don't take it out on me.

他的秘书成了他的出气筒。

His secretary had to bear the burnt of his temper.