1) Banking term 
A loan shark is a person or body that offers loans at extremely high interest rates. The term usually refers to illegal activity, but may also refer to predatory lending with extremely high interest rates such as payday or title loans. Loan sharks sometimes enforce repayment by blackmail or threats of violence. Historically, many moneylenders skir...
A popular term for an unlicensed lender of money, often charging exorbitant interest rates and employing dubious collection methods 
Someone who offers unsecured loans at excessive rates of interest
a person who lends money at excessively high rates of interest; usurer.