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
Janna	YAHN-nah (Dutch, Finnish), JAN-ə (English)	Dutch, Swedish, Finnish, English
Johann	YO-hahn	German
Rhode	-	Ancient Greek, Biblical Greek, Biblical Latin
Osher	-	Hebrew
Mawar	-	Indonesian, Malay
TÓDor	-	Hungarian