I'm a big believer in darkcoin... and I am shorting at .0051
How do you short? Is there an exchange doing this now?
His meaning is that he tried to sell at around 0.0051 to buy back at lower price. There is always a risk involved here, if it doesn't go down he will end up missing the train and hating himself or just rebuying back at higher rate than he sold

its a risky short as we are now only a few days away from a major milestone.
It's not a short. It was a sale with the hope of buying back cheaper. A, "Short" in equity trading terms is where you borrow someone else's equity on margin in a bet that the price goes down so that you can buy it back at that lower price to, "Cover" your short.
VERY different things. I was hoping an exchange had set margin trading and shorting up. The first that does it well will make a ton of money.
The concept of shorting has been re-framed for crypto.