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
See blockbusting in American Heritage Dictionary 4
noun Informal
The practice of persuading white homeowners to sell quickly and usually at a loss by appealing to the fear that minority groups and especially Black people will move into the neighborhood, causing property values to decline. The property is then resold at inflated prices.