giant monster; large monster
Refers to a giant monster, especially in the context of Japanese kaiju films (e.g., Godzilla, Mothra). The term evokes the classic tokusatsu genre.
この映画には大怪獣が登場する。
A giant monster appears in this movie.
大怪獣バトルというゲームが人気だ。
A game called Giant Monster Battle is popular.
Compound of 大 (dai, 'big') and 怪獣 (kaijū, 'monster'). The term is closely associated with Japanese monster movies (kaiju eiga).