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
ElİF	-	Turkish
Matty (2)	-	Medieval English
Kulap	-	Thai
Erminlinda	-	Ancient Germanic
Pramoda	-	Hinduism
Sefu	-	Eastern African, Swahili