1. To loiter (somewhere); to idly waste time (somewhere). Would you two quit hanging about and help me clean up this mess already?I wish you wouldn't hang about the house like this. Why don't you go outside for a while?
2. To frequent the company (of someone); to spend a lot of time (with someone). Why are you always hanging about with that jerk? All he ever does is insult us!I wish your little brother would quit hanging about. Doesn't he have his own friends to spend time with?