斯国一

    sīguóyī

    Meaning: This is the transliteration of a Japanese word "凄い," which means "superb, fantastic, extraordinary." It's frequently used by Chinese netizens who are fans of Japanese anime and Japanese pop culture to marvel at or praise someone or something.

    Example

    A: 知道小李寒假读完了几本书吗？

    Zhīdào xiǎolǐ hánjià dú wán le jǐběn shū ma?

    Do you know how many books Xiao Li finished reading during the winter vacation?

    B: 不知道。

    Bù zhīdào。

    I have no idea.

    A: 他读完了十本非小说类的英文书，而且每一本都做了笔记。

    Tā dú wán le shíběn fēi xiǎoshuō lèi de yīngwén shū, érqiě měi yīběn dōu zuò le bǐjì。

    He read 10 non fiction books written in English, and took notes on every one of them.

    B: 斯国一!

    Sīguóyī！

    That's extraordinary!