noun
A person who habitually gets into fights or is known for brawling; often carries a rough, streetwise connotation.
あの男は町で有名な喧嘩師だ。
That man is a well-known brawler in town.
彼は若い頃、喧嘩師として恐れられていた。
When he was young, he was feared as a ruffian.
暴れん坊 emphasizes wild, unruly behavior, often used for children or rowdy individuals, while 喧嘩師 focuses on fighting and brawling.
Compound of 喧嘩 (けんか, 'fight, quarrel') and 師 (し, 'master, specialist'), literally 'fight master'. The exact historical derivation is uncertain, but it follows a common pattern for describing a person known for a particular behavior.