noun: rapscallion; plural noun: rapscallions
a mischievous person.
late 17th century: alteration of earlier rascallion, perhaps from rascal.
I actually use this word quite a bit when referring to my three boys, my cat, or the squirrels who always best me when getting to the bird feeder. It has an old-world vibe to it, like you are telling your second to hold your cloak whilst you defend life and honor against someone who has sullied your good name.
It is a playful term, and I think it would be very easy to introduce it into your normal conversation. Give it a whirl!