green as a gooseberry

Very young, immature, and/or inexperienced. Are you sure he's fit to run your campaign? He's just out of college and still as green as a gooseberry!

Name	Pronounced	Usage
Mukul	-	Indian, Hindi
Fortunatus	-	Late Roman
KonrÁD	-	Hungarian, Czech, Slovak
Andres	-	Estonian
Ensio	EN-see-o	Finnish
Joiner	['dʒɔinə]