English▸ noun an extortionate or very high rent, especially an annual rent equivalent to the full value of the property to which it relates.
▸ verb (rack-rent) [with object] dated exact an excessive or extortionate rent from (a tenant) or for (a property):
(as noun rack-renting) hundreds of thousands of peasants who hate corruption, rack-renting, and foreign intervention
(as adjective rack-renting) rack-renting landlords.