A person who loans money to others and charges interest, particularly at an illegal, exorbitant, or unfair rate.
1609, William Shakespeare, Sonnet 4:
Profitless usurer, why dost thou use
So great a sum of sums, yet canst not live?
1936, Margaret Mitchell, Gone with the Wind, chapter XLIII
"You can go to the Carpetbag usurers if you want money."