STRICTLY TA, page-25

Shorting the stock is the act of borrowing shares and selling them on market now, with the intention of buying them back at a lower price and replacing them. Therefore, profit.

The downramping from shorting is when there is a quick dump of a large number of shares on the market, making people question why the dumping? If a seller sells quickly, they have to lower their sell price to match the buyers, causing the "last trade price" to drop. Otherwise they could be waiting for some time.

But of course you wouldn't short to create the fear of dumping, you would short when the fear already exists.