What’s a drip (nice picture from flickr eh?), well the i is added in kind of, but it is Dividend Reinvestment Plan, is what the TLA (three letter acronym) means. Typically a stock, or mutual fund (I think) will offer this to their shareholders. You sign up for this and instead of getting your Dividends as cold hard cash, you get it as Stock in the company, and typically the stock purchase has no brokerage fees (which is always nice). The Motley Fools talk about DRPs here.
Now I had forgotten about this method of investing, but thanks to the Moneysaver web site, I have remembered and am now about to sign up for DRPs for the bank stocks that I already own. The Canadian Capitalist tweaked me to go look at the Moneysaver web site, so again, Good On You, my friend.