Inclined to do slightly naughty things for fun; mischievous.
Old English impa, impe ‘young shoot, scion’, impian ‘to graft’, based on Greek emphuein ‘to implant’. In late Middle English, the noun denoted a descendant, especially of a noble family, and later a child of the devil or a person regarded as such; hence a ‘little devil’ or mischievous child (early 17th century).
Todd was impish,
A little scamp.
He rode his skateboard
Down the busy ramp.