грабительский процент(Taras); высокий процент(чрезмерно Taras); барыш(profit; freely adapted from vigorish (interest on a loan); the word vig is short for vigorish, which is bookie slang for a fee that's charged on each bet placed. It can also mean interest paid on a loan. It's origin seems to be the Yiddish word vyigrysh, meaning "profit or winnings." Taras)
чрезмерно высокие проценты(An excessive rate of interest on a loan, typically one from an illegal moneylender. short for vigorish, prob. via Yiddish from Russian profit, winnings • vyigrysh)