also: やんちゃん
na-adjective, noun, noun or participle which takes 'suru', intransitive verb
Describes a child or young person who is playfully disobedient or full of energy, often in an endearing way.
うちの子はやんちゃで、いつも外で遊び回っている。
Our kid is mischievous and always running around outside.
やんちゃな小学生たちが公園で騒いでいた。
The unruly elementary school kids were making noise in the park.
noun
rascal; naughty kid
Refers to a child who is habitually naughty; can be used affectionately or with mild exasperation.
あのやんちゃはまたいたずらをした。
That rascal has been up to mischief again.
noun, noun or participle which takes 'suru', intransitive verb, na-adjective
Colloquial use for more serious misbehavior, often associated with teenage rebellion or minor delinquency.
高校のときはやんちゃして、よく先生に怒られた。
In high school I was a bit of a delinquent and often got scolded by teachers.
na-adjective, noun
Describes fashion, style, or behavior that is audaciously eye-catching or unconventional.
彼女のやんちゃなファッションはいつも注目を集める。
Her bold fashion always attracts attention.