There is a certain kind of fat person that drinks Mountain Dew like they eat their food: all the fucking time.  I remember once I was on a sort of shuttle that ran between a town close to my dad's hometown and the big city I live in (I don't have a car), and this one guy kept whining at the driver to stop off at a gas station because, "I haven't had a Dew all day!"  It was like ten in the morning, and the drive was two hours.