Someone who is extremely frugal or miserly with their money; someone who is very unwilling or reluctant to spend. 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!It was when I was completely broke in college that I became something of a penny pincher.
penny-pincher
n. someone who is very miserly; someone who objects to the expenditure of every penny. If you weren’t such a penny-pincher, you’d have some decent clothes.