Cantrip is a noun that refers to a trick or a mischievous act.
The origin of our word of the day is unknown, but we do know it entered English in the late 16th century from Scottish. Here’s an example if its use:
When I saw a fresh plate of blueberry muffins on the breakfast table, I should have known it was a cantrip played by my son. Only a mind as mischievous of his could have tricked me into mistaking raw batter for blueberry muffins.