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This question already has an answer here:

Sometimes I see people attaching a w at the end of sentences (or multiple ws):

なんか知らない間に人がめっちゃ増えてるw

This is in an informal context, usually while chatting. And sometimes, just:

wwwww

What is that w doing there? How do I read it?

marked as duplicate by naruto, Community May 26 '17 at 8:46

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