解释:击败;攻击;弄伤
to beat someone up; to assault someone; to damage someone.

The crooks banged him up a little bit.

The crash banged up the passengers in the car.

She banged herself up badly.

bang something up

解释:撞坏,毁坏,损坏

to crash or wreck something; to damage something.

Don't bang my best skillet up!

Who banged up my best skillet?