Real Dictionary

blockbusting
A blockbusting film or book is one that is very successful, usually because it is very exciting.

blockbusting in American English
the practice of inducing homeowners in a particular neighborhood to sell their homes quickly, often at a loss, by creating the fear that actual or prospective purchases by members of a minority group will bring a loss of value
noun: the profiteering practice by unscrupulous real-estate agents or speculators of reselling or renting homes that they obtain by inducing panic selling at prices below value, esp. by exploiting racial prejudices

blockbusting in British English
noun: the act or practice of inducing the sale of property cheaply by exploiting the owners' fears of lower prices if racial minorities live in the area