A loan shark is a person or body who 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 skirted between legal and extra-legal activity. In the recent western world, loan sharks have been a feature of the criminal underworld.