A blockbusting film or book is one that is very successful, usually because it is very exciting.
[journalism, informal]
...a four-hour blockbusting disaster movie spread over two nights.
blockbusting in British English
(ˈblɒkˌbʌstɪŋ)
noun
US informal
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
blockbusting in American English
(ˈblɑkˌbʌstɪŋ)
US
noun Informal
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