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young motorcycle-riding delinquents; bōsōzoku
夜中に暴走族のバイク音が響いた。
The roar of bōsōzoku motorcycles echoed through the night.
彼は若い頃暴走族に入っていたと言った。
He said he was in a bōsōzoku gang when he was young.
地域の住民が暴走族の騒音問題を警察に訴えた。
Local residents filed a complaint with the police about the bōsōzoku noise.