played about; playing about; plays about
: to have sex with someone who is not one's husband, wife, or regular partner
He's not the kind of guy who plays about.—often + on
She's been playing about on her husband.—often + with
She's been playing about with one of her coworkers.
: to deal with or treat something in a careless way
When it comes to protecting his family, he doesn't play about.—often + with
You can't play about with diabetes; it's a very serious disease.
: to use or do something in a way that is not very serious
It's time to stop playing about and get busy.—often + on
I spent the evening playing about on the piano/computer/Internet.—often + with
I'm not really a painter; I just like to play about with paints.
Love words? Need even more definitions?Merriam-Webster unabridged