cash cow

When you start a new business, you hope it will be a cash cow, or a venture that's so successful that it makes a steady stream of money.

Anything from selling handmade earrings at a craft fair to inventing a new kind of technology can be a cash cow, as long as it makes a lot of money. There are different opinions about where the phrase came from originally. One theory connects it to the tradition of devout Hindus offering money to temple gods resembling cows, while another likens the flow of money from a cash cow to the flow of milk from an actual cow.

Definitions of cash cow
  1. noun
    a project that generates a continuous flow of money
    synonyms: money-spinner, moneymaker
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    type of:
    project, projection
    a planned undertaking
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