いい大人
いいおとな · also よいおとな
(an) adult their age (should, should not, etc.); grown man (woman); person who is old enough (to know better)
Meaning
- (an) adult their age (should, should not, etc.); grown man (woman); person who is old enough (to know better)
Example sentences
もういい大人なんだから、しっかりしなきゃ駄目でしょ。
You should know better now you're an adult.