big boom; big craze; all the rage
Used for a widespread, intense fad or trend, often in media or consumer culture.
最近、タピオカミルクティーが大ブームだ。
Lately, bubble tea has been all the rage.
あのゲームは去年大ブームになった。
That game became a huge craze last year.
Compound of 大 (dai, 'big') and ブーム (būmu, from English 'boom').