Hang About Meaning

(idiomatic) To spend time or be friends (especially to hang about with someone).

Example:   If you hang about after the show, you can meet the cast.
1883, Robert Louis Stevenson, Treasure Island
  The stranger kept hanging about just inside the inn door, peering round the corner like a cat waiting for a mouse.
1922, James Joyce, Ulysses Episode 16
  Though unusual in the Dublin area he knew that it was not by any means unknown for desperadoes who had next to nothing to live on to be abroad waylaying and generally terrorising peaceable pedestrians by placing a pistol at their head in some secluded spot outside the city proper, famished loiterers of the Thames embankment category they might be hanging about there or simply marauders ready to decamp with whatever boodle they could in one fell swoop at a moment's notice, your money or your life, leaving you there to point a moral, gagged and garrotted.
  My daughter likes to hang about with older kids after school.