be (not) (one's) department

To be one's area of expertise or responsibility. I can't approve expense reports—that's not my department. Car repair is my dad's department, so he should be able to help you out.

Common Names:

Name	Pronounced	Usage
Godeliva	-	Ancient Germanic
Shelah	-	Biblical
Mircea	-	Romanian
Kouta	ko:-tah	Japanese
Sten	-	Swedish, Danish, Norwegian, Dutch
Cainneach	-	Irish