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
Gracja	GRATS-yah	Polish
Raziela	-	Hebrew
Celso	CHEL-so (Italian), THEL-so (Spanish), SEL-so (Latin American Spanish)	Italian, Spanish, Portuguese
Adrastos	-	Greek Mythology
Cadi	-	Welsh
Miles	MIELZ, MIE-əlz	English