haututū - mischievous
Haututū, a. Insubordinate, obstructive. Te Urewera, he iwi haututū.
Williams Dictionary
He tama haututū rātouThey are mischievous boys
He haututū a Kōuraraka.He then goes on to say that Kōuraraka tends to be rather playful and mischievous
Kātahi te tamaiti haututū!What a mischievous child! (Te Aka Māori Dictionary)
Kaha rawa ia ki te haututū me ērā atu mahi a te tamariki tāne.He’s too much into playing up and the other things that boys will get up to.