punching bag

US /ˈpʌn.tʃɪŋ ˌbæɡ/
UK /ˈpʌn.tʃɪŋ ˌbæɡ/
"punching bag" picture
1.

沙袋, 拳击袋

a heavy bag, usually made of leather or canvas, filled with sand or other material, that is suspended from above and used for punching practice by boxers or other martial artists

:
He trains daily with a punching bag to improve his boxing skills.
他每天用沙袋训练以提高拳击技能。
The gym has several different types of punching bags.
健身房有几种不同类型的沙袋
2.

出气筒, 替罪羊, 受批评的对象

a person or thing that is repeatedly subjected to criticism, abuse, or attack

:
He became the team's punching bag after a series of losses.
在一系列失败后,他成了球队的出气筒
The manager used the new intern as a punching bag for all his frustrations.
经理把新来的实习生当作出气筒,发泄所有的不满。