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
Shakura	-	Arabic
Aeronwy	-	Welsh
Doris	DAWR-is (English), DO-ris (German)	English, German, Croatian, Ancient Greek, Greek Mythology
Norene	[nɔ:'ri:n]
Evron	-	Yiddish
Mithradatha	-	Ancient Persian