block·bust·er 
/ˈblɑ:kˌbʌstɚ/ noun
plural block·bust·ers /ˈblɑ:kˌbʌstɚ/ noun [count] : something that is very large, expensive, or successful
▪ a 900-page blockbuster of a novel ▪ The actor starred in a blockbuster [=a very successful movie] last year. — often used before another noun ▪ a blockbuster movie ▪ a blockbuster product
▪ a 900-page blockbuster of a novel ▪ The actor starred in a blockbuster [=a very successful movie] last year. — often used before another noun ▪ a blockbuster movie ▪ a blockbuster product
