also: おんにゃのこ
noun
Internet slang term derived from 女の子 (おんなのこ), used in a playful or affectionate way online. Often written in kana, but the kanji spelling おにゃの子 is also used.
See also: 女の子
このおにゃの子、めっちゃかわいい！
This girl is super cute!
おにゃの子とカラオケに行った。
I went to karaoke with a young woman.
Derived from 女の子 (おんなのこ) by replacing ん with にゃ, a common playful sound change in internet slang.