run around

• • 东奔西跑，到处乱跑：

    They love to run around on the playground.

    他们喜欢在操场上跑来跑去。

  • [口语]同(不三不四的人)交往，结交；乱交异性朋友；私通：

    He is well-known for running around.

    他到处乱搞都出了名了。