also: オニイけい
noun
onii-kei; men's fashion style with brown hair, deep tan, and luxury brands
A Japanese men's fashion subculture from the 2000s, associated with gyaru-o (male gyaru) styles. Characterized by brown or bleached hair, dark tanned skin, and expensive brand-name clothing and accessories.
お兄系ファッションは、茶髪と日焼けした肌が特徴だ。
Onii-kei fashion is characterized by brown hair and tanned skin.
彼は全身ブランド物で固めたお兄系スタイルだ。
He's dressed in a full onii-kei style with brand-name items from head to toe.
From お兄 (onii, 'older brother') + 系 (kei, 'type/style'), referring to a mature, 'big brother' look within gyaru fashion.