Select the most appropriate meaning of the given idiom.

Play with fire

To do something risky

The most appropriate meaning of the idiom "play with fire" is to do something risky. It means to engage in an activity that could have harmful or dangerous consequences.

The other options are not as appropriate.

• To play a game honestly means to play a game without cheating or breaking the rules.
• To please someone means to do something that will make someone happy or satisfied.
• To waste time on worthless things means to spend time on activities that are not productive or meaningful.