ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
Etymology: block (I) (space in a city) + buster, from bust, v. + -er
1. : a huge high-explosive demolition bomb usually several tons in weight designed to be dropped from an airplane
2. : something or someone notably outstanding, effective, or violent
they predict the new show will be a blockbuster
his speech was a real blockbuster