A "second mortgage" refers to a mortgage whose lien is subordinate to that of a first or "senior" mortgage. The first mortgage is the first one to be paid back if the property is sold or goes into default.
A "DRIP" or "dividend reinvestment plan" is a company plan providing for an automatic reinvestment of shareholder dividends into more shares of the company's stock. Some dividend reinvestment plans provide for the purchase of additional shares at a discount to the market price and without commissions.