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
Metody	me-TAW-di	Polish
Sunitha	-	Indian, Kannada, Telugu, Tamil, Malayalam
Georges	ZHORZH	French
PÁDraig	PAW-drig, PAW-rig	Irish
Irving	UR-ving (English, Scottish)	English, Scottish, Jewish
Mina	['mi:nə]