1
(one's) older brother
「百八といえば煩悩の数だ」「お兄ちゃんはどんな煩悩があるの？」「言ってもいいが、検閲削除になるぞ」
"Talking about 108, that's the number of worldly passions." "What worldly passions have you got then?" "I could say, but it'll get censored out."
2
lad;sonny
oft. vocative
ママー、今あのおにいちゃんすごいころんだよー。
Mummy, that man just fell flat on his face!
Other forms
御兄ちゃん 【おにいちゃん】 (search-only kanji form)