a cash cow

a business or a part of a business that always makes a lot of profit The British newspapers are the group's biggest cash cow, earning nearly 40% of group profits.

Common Names:

Name	Pronounced	Usage
Hillary	HIL-ə-ree	English
Monroe	[mən'rəu]
Julie	['dʒu:li]
Adalfarus	-	Ancient Germanic (Latinized)
Svyatoslav	svyah-tah-SLAHF (Russian)	Russian, Ukrainian
BernÁT	-	Hungarian