Wiktionary
vb. 1 to spend time with someone as a friend 2 To do a relaxing activity. 3 To be in an unknown place. 4 To hit someone, or behave violently towards them.
Usage examples of "knock around".
One wouldn't expect that the scrawny old black man who's vaulted up onto the stage could knock around a bruiser like Beezer, but this is no ordinary old man.
We went in this pub and there was this girl there he used to knock around with.
He turned around to trek back again, but Christian brought them to the bath and left him alone, afterward, to knock around the small mirrored space, getting undressed.
You see, the Lahui need people like that, and the elders thought I had the talent, so they encouraged and supported me to knock around.
He was not pleased to hear a soft, almost secretive knock around midmorning but gave the call for admittance.