bang around
To jostle someone or something; to knock things together. A noun or pronoun can be used between "bang" and "around." Be careful with that box—don't bang around my glassware! I got banged around in that car accident. I think that kid will listen to us if we bang him around a bit and scare him.
bang someone or something around
to knock someone or something about; to beat or strike someone or something. Let's bang him around a little and see if that will change his mind. Why are you banging around my friend? Don't bang those pans around. He banged himself around badly in the car wreck.