The little boy was a real handful. He was always uptomischief.
这个小男孩真是难管教。他总是在搞恶作剧。
《柯林斯英汉双解大词典》
2
As they grew more mobile, we let them move freely around the house during the day, but when we were asleep we had to contain them in a large room, otherwise they'd get uptomischief.