MD 20/20 is an American fortified wine. MD 20/20 has an alcohol content that varies by flavor from 13% to 18% (with most of the 18% varieties discontinued, although Red Grape is still available in 18% ABV). The MD actually stands for its producer, Mogen David, however, it is widely known as "Mad Dog". Originally, 20/20 stood for 20 oz @ 20% alcohol. Currently, MD 20/20 is not sold in 20 oz bottles nor at 20% alcohol by volume.