his youthful 'impishness'
an 'impish' grin/smile
an 'impish' face/look
(..) political, cretin... That is an error. It is an error to go so deep with those things. You are a very young boy, an impish young boy. But I can tell you, you are a youth, that you have fire in the blood. And it is kind of a relief... - Wayne, that they are speaking? - That? (..)2007 Into the Wild