Words, expressions, etc considered very informal, usually used mostly by in-groups, such as young people, and easily affected by trends and fashions.

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19
votes
4answers
3k views

What is the meaning of all those “w”s in email and SNSs?

You see a lot of w and ww and even www in Twitter and casual chat. What does it mean? I've always thought it was わいわい but never found out. How is it pronounced? Here's an example from Twitter ...
15
votes
4answers
872 views

Where does なう on Twitter come from?

If you follow any Japanese speakers on Twitter, you'll almost certainly see them use なう at the end of a sentence, to say "I am in this place/doing this thing now". Where does this use come from? Who ...