Definition from Wiktionary, the free dictionary
to bang up (phrasal verb)
- To damage.
- He banged up his new car last night.
- To put someone in prison.
- He was so drunk that the police banged him up for the night.
Usage notes 
- In all senses the object may appear before or after the particle. If the object is a pronoun, then it must be before the phrasal verb particle (up).