1. 
2. 
[syn: blockbuster, megahit, smash hit]
WordNet (r) 3.0 (2006):
blockbuster
    n 1: a large bomb used to demolish extensive areas (as a city
         block)
    2: an unusually successful hit with widespread popularity and
       huge sales (especially a movie or play or recording or novel)
       [syn: blockbuster, megahit, smash hit]
Moby Thesaurus II by Grady Ward, 1.0:
22 Moby Thesaurus words for "blockbuster":
   astonishment, blow, bomb, bombshell, catch, earthshaker,
   eye-opener, joker, kicker, peripeteia, revelation, shocker,
   staggerer, startler, surprisal, surprise, surprise ending,
   surprise package, surprise party, switch, thunderbolt,
   thunderclap