Country Dictionary

something set up that is guaranteed to bring in loads of money

sales tax, speed traps, parking meters...etc.

something whose sole purpose is to bring in money, and usually loads of it.

the speed traps set up by the cops are just another cash cow to fill city hall's coffers.

(n.) A well-selling product into which no investment is put asides meagre marketing and production costs, yet price rises rise disproportionatley to costs, and well above inflation, milking the cow for all it's worth.

Oil prices are the biggest of all cash cows.

A cash cow is someone who's only dating you
or being your friend for your money and
benefits they can take from you

Jenny: your best friend is only using you, she
doesn't care about you
Kerry: no she’s not
Jenny: trust me she's a cash cow

cash cow a rich and often homely woman who is tolerated for her ability to keep her man ensconced in her world of luxury.

Biff won't break up with Marge until he finds another old hag worth a hundred million; as far as cash cows go, he hit paydirt.

a fattie who guys use to pay for things and do in the butt

"sheera is alex's cash cow"

Dancing with (sometimes going home with) a large woman to get her to buy you drinks all night.

Is that Charlie out there on the floor with a "cash-cow"?

or

Yeah, that cash-cow is big, but I'm hammered and only paid the cover charge.