ORIGINAL: Jeremiah 29:11
(Disclaimer: I've never used "sick" as a positive adjective before - I'm waaay to old for that - but it just seemed appropriate here.)
Well you could use "cool", "awesome", "rad", "radical", "bad to the bone", "sweeeeeet" , and "sick is one of the newer words.
Just keep up with times so you don't start acting old.

Sadly, I think I'm too old for "rad", too. I guess I should stick to "cool." [8D]
At least I'm too young for "groovy!"
No chance of me acting old. I'm the biggest kid I know.
Now, back to my PS3...