爆笑 ばくしょう
bakushō

Noun
Suru Verb

1. roar of laughter (from multiple people); burst of laughter; uproarious laughter

Intransitive
クラス全体 ぜんたい先生 せんせいのジョークに爆笑 ばくしょうしました。
kurasu zentaiga sensēno jōkuni bakushō shimashita.
The whole class burst into laughter at the teacher's joke.
Noun
Suru Verb

2. laughing hard (of a single person)

Intransitive
Colloquial