"Jack around" is a colloquial expression that means to waste time, procrastinate, or fool around in a frivolous manner. There are several synonyms for this phrase, including "lollygag," "dilly-dally," "putter," "tinker," "fiddle," "loiter," and "dawdle." These words all convey the same idea of engaging in unproductive activities without any real purpose or focus. They can be used interchangeably with "jack around" in most contexts, whether it's describing someone's behavior or making plans that involve such time-wasting activities. Overall, these synonyms offer a variety of ways to express the idea of wasting time or being unproductive, making it easy to find the right word for any situation.