fool around

He started fooling around with it and has been playing lacrosse ever since.

What kind of bullpen fools around with an eight-run lead, as the Dodgers reliever did Tuesday night when threatening to ruin everything?

Composers were fooling around with repetition, drones, tape loops and the like.

Pashinyan has also attacked other senior clergymen, including accusing one archbishop of having an affair, with the extraordinary allegation of "fooling around" with his uncle's wife.

They fooled around briefly with different group names and pop-rock styles until Dennis came up with the idea of doing a song about surfing.