also: いっちょまえ
He is already a full-fledged adult.
You've started talking like a grown-up, haven't you?
noun which may take the genitive case particle 'no'
fully fledged; established; qualified
Describes someone or something that is competent, independent, or worthy of recognition in a role or skill. Often used in the phrase 一丁前の〜.
He became a fully fledged craftsman.
She has become able to give a qualified opinion.