I don't understand Japanese but here are the meanings in Chinese. My guess is the second one used much more in daily written language
Japanese Language
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Remember that you can add furigana to your posts by writing ~{KANJI|FURIGANA}~ like:
~{漢字|かんじ}~ which comes out as:
{漢字|かんじ}
Ah, no, this is some Internet slang, and oddly enough it comes from the first meaning. AFAIK, the second one doesn't exist in Japanese.
~~Basically, "hahaha" in Katakana is written as ハハハ. If you line up enough ハハ's, it will look like a series of w's.~~ In chats, they use w (from 笑い、warai) to denote laughter. If you line up enough wwww's, it looks like grass. That's how 草 ended up meaning LOL.
Oh I had heard that w came from 笑い but yeah, it’s 草 because it looks like grass