blockbuster

Short definition from Wiktionary

Noun

1. 1
   A high-explosive bomb used for the purposes of demolishing extensive areas, such as a city block.
2. 2
   Something, such as a film or book, that sustains exceptional and widespread popularity and achieves enormous sales, as opposed to a box office bomb.
3. 3
   Something, especially an event or a film, book or other creative work, that is intended to achieve high sales (perhaps indicated by large budgets or high advertising spending) or that is conceived on a large or epic scale
4. 4
   Anything very large or powerful; a whopper.
5. 5
   A large firework of the firecracker type; an M-80.
6. 6
   One who engages in blockbusting (technique encouraging people to sell property).