godan verb (-gu), intransitive verb
make a din; raise a clamor
Describes a group of people making a loud, disorderly noise, often while standing or moving about.
酔っ払いたちが店の前で立ち騒いでいた。
Drunk people were making a din in front of the shop.
Standard kanji spelling.
Kana spelling is acceptable, especially in informal writing.
騒ぐ is a general term for making noise or causing a commotion. 立ち騒ぐ specifically implies people standing and making noise, often in a group.
Compound of 立ち (tachi, continuative form of 立つ 'to stand') and 騒ぐ (sawagu, 'to make noise').