To engage in aimless recreation or frivolous time-wasting; to fool around. Quit goofing around and get back to work already!You'd probably have better grades if you didn't goof around so much in class.
goof around
to act silly. The kids were all goofing around, waiting for the bus.Stop goofing around!
goof around
v.
To act foolishly, playfully, or without a clear sense of purpose: The students who goofed around all semester failed the course.