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An informal term for one's older brother, also used to address an older male friend or senior (e.g., in yakuza or school settings).
兄貴、手伝ってくれよ。
Bro, could you give me a hand?
Often heard in manga, anime, and among male peers; rarely used by women.
Reserve 兄貴 for close male friends, teammates, or when adopting a tough persona; avoid using it with strangers or in polite conversation.
Composed of 兄 (older brother) + the honorific suffix 貴 (ki), originally used as a respectful way to refer to an older brother.
Used mainly among males in casual settings; can convey camaraderie or hierarchical respect. In formal contexts, use お兄さん.