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
BjÖRk	PYUURK	Icelandic
Kenith	KEN-ith	English (Rare)
Rauf	-	Arabic
Lal	-	Indian, Hindi, Nepali
Aindrea	-	Scottish
Lojze	-	Slovene