
Bang up
Colloquial Usage
Used in casual conversation, might not be appropriate in formal writing.
I can't believe you banged up the van again!
Severity of Damage
Implies significant damage, more than just a scratch or dent.
After the accident, his bike was completely banged up.
Physical Impact
Often suggests a forceful or violent collision with an object.
He slipped on the ice and banged up his knee pretty bad.