Mess around

The kids sat there messing around with leaves and blades of grass because they were bored.

These guys don't mess around! They finished the whole job in ten minutes.

Hey, don't take it personally. I was only messing around.

Don't mess around with electricity if you don't understand it.

Rumor has it that he's messing around with his secretary.

She grew up as the pretty young thing / Let them look up her skirt on the backyard swing, oh no / And Daddy told you to stay indoors / And I can understand how a girl gets bored / Too old to play and too young to mess around