cash cow
US /kæʃ kaʊ/
UK /kæʃ kaʊ/
1.
金のなる木, ドル箱
a product or service that generates a large amount of money for a company, often with little effort or investment once established
:
•
Their flagship software has been a real cash cow for years.
彼らの主力ソフトウェアは長年、まさに金のなる木だった。
•
The old product line might not be innovative, but it's still a reliable cash cow.
古い製品ラインは革新的ではないかもしれないが、それでも信頼できる金のなる木だ。