What does 兄貴 mean?
兄貴 is a Japanese noun meaning “elder brother” in English. It can also be translated as “one's senior, older man” depending on context. It is written as 兄貴 in kanji, あにき in hiragana, and aniki in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
「そっか。暇なら掃除しといて」「なんだそれ。兄貴をアゴで使うなよ」
"Oh? If you're free get the cleaning done." "What's up with that? Don't order your brother around!"