noun
Refers to a highly successful movie, book, or other entertainment product that achieves massive commercial success.
この夏のブロックバスター映画は、公開初週末に記録的な興行収入を上げた。
This summer's blockbuster movie earned record box-office revenue in its opening weekend.
Borrowed from English 'blockbuster', originally a large bomb in WWII, later extended to a hugely successful entertainment product.