be wet behind the ears
US /bi wɛt bɪˈhaɪnd ðə ɪərz/
UK /bi wɛt bɪˈhaɪnd ðə ɪərz/

1.
inexperiente, verde
to be young and without experience
:
•
He's still wet behind the ears, so don't expect him to handle this complex project alone.
Ele ainda é inexperiente, então não espere que ele lide com este projeto complexo sozinho.
•
When I started my first job, I was completely wet behind the ears.
Quando comecei meu primeiro emprego, eu era completamente inexperiente.