blockbuster
/ˈblɒkˌbʌstə/
nouninformal
noun: blockbuster; plural noun: blockbusters
a thing of great power or size, in particular a film, book, or other product that is a great commercial success.
i.e. "the latest Hollywood blockbuster"
Origin: 1940s (denoting a huge aerial bomb capable of destroying a whole block of streets): from block + buster.