grow up
US /ɡroʊ ˈʌp/
UK /ɡroʊ ˈʌp/
1.
to become an adult
:
•
My children are growing up so fast.
•
What do you want to be when you grow up?
2.
to stop behaving in a childish way
:
•
It's time to grow up and take responsibility.
•
He needs to grow up and stop complaining about everything.