なう ("now") is a recent invention,
in usage on Twitter.
It comes at end-of-sentence and can work like (temporal) ところ or 中(ちゅう), but it's more lenient in what it attaches to.
~なうの使用例
今、北海道にいます→北海道なう[1]
(こちらは)快晴です→快晴なう[2]
今、ジョギングをしています→ジョギングなう[3]
なうい ("now-i") is a bit older, and is an i-adjective meaning "in fashion".
Seems to be some info on ちょっちゅね
here...
Similarly
うけぴー ...
どうかしてるぜっ (the same as どうかしている, "[you're] freaking nuts" / "[it's] gone crazy")
ありえんてぃ (from ありえない, "not possible")
Probably it's not too hard to find info on the others either...
Personally, though, I'm not interested enough to read about most of these, 'cause I've never seen them used anyway
