Fool around and Get into mischief

Fool around verb - To engage in attention-getting playful or boisterous behavior.

Get into mischief and fool around are semantically related In some cases you can use "Get into mischief" instead a verb "Fool around".

Fool around and get into mischief are semantically related in act in inappropriate manner topic. You can use "Fool around" instead a verb phrase "Get into mischief".