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
Magnus	MAHNG-nus (Swedish), MAG-nəs (English)	Swedish, Norwegian, Danish, Late Roman
Madalyn	MAD-ə-lin	English
Panna	PAWN-naw	Hungarian
Dakota	də-KO-tə	English (Modern)
Astill	['æstil]
DaniËLle	-	Dutch