Pinch pennies 精打细算；省吃俭用
Ever since we had our second child, we've had to pinch pennies to make sure they both get what they want for Christmas.
My ex-husband was such a penny pincher that, on the rare occasion we would go out to eat, he wouldn't even leave a tip!
Miser /ˈmaɪzɚ/ 铁公鸡
People say he is a miser who has thousands of pounds hidden under his bed.
Her father is a real scrooge and refuses to pay her way through college, even though he can easily afford it.
It was generous of you to lend me the money.