When we talk about "goofing around", we refer to the act of acting silly or behaving playfully without a clear purpose or goal. Some synonyms for this term include fooling around, horseplay, messing around, clowning, joking, or kidding. These phrases imply a playful or humorous tone, but can also have negative connotations if taken too far or in inappropriate situations. Other similar terms include wasting time, loitering, dilly-dallying, or idling. Regardless of the term used, it's important to remember to balance fun with responsibility and respect for others and their surroundings.