also: おしゃまさん
noun, na-adjective
precocious; acting grown up
Only with reading おしゃま
Describes a young girl who behaves in a mature or coquettish way beyond her years. Often used with a slightly amused or critical tone.
あの子はまだ5歳なのにおしゃまだね。
That child is only five, but she acts so grown up, doesn't she?
おしゃまな口をきくようになった。
She's started talking in a precocious way.
noun
precocious girl
Refers to the girl herself. Often used as おしゃまさん.
うちのおしゃまさんがまた大人の真似をしている。
Our little miss precocious is imitating adults again.