A naughty child is a child who misbehaves and does not follow rules. The crossword solutions for this term are MONKEY (6 letters), IMP (3 letters), and BRAT (4 letters). MONKEY is a term used to describe someone who is mischievous or playful, often in a way that is seen as annoying. IMP is a term used to describe a mischievous child, usually one who is small and full of energy. BRAT is a term used to describe a child who is spoiled and behaves badly.