stingy with money; greedy about money
Describes a person who is tight-fisted, reluctant to spend, or overly focused on money. Often used critically.
He's so stingy with money that he's never treated his friends.
That company president is greedy about money and rarely raises employees' salaries.
A set phrase combining 金 (money) with the particle に and the adjective 汚い (dirty), literally 'dirty with money', used idiomatically to mean stingy or greedy about money.