A somewhat colloquial or emphatic term for money, often implying coins and bills together. Can carry a slightly rough or informal tone.
If you keep talking about money all the time, people will think you lack class.
That guy is really fussy about money.
Compound of 銭 (zeni, 'small coin') and 金 (kane, 'money'). The combination emphasizes both coins and money in general, often with a colloquial or slightly derogatory nuance.