Blockbuster

korttelipommi

jymymenestys A high-explosive bomb used for the purposes of demolishing extensive areas, such as a city block.
Something, such as a film or book, that sustains exceptional and widespread popularity and achieves enormous sales, as opposed to a box office bomb.
A large firecracker type of fireworks; an M-80.
An exceptional event.

There was a blockbuster trade in baseball today.