“The Dew” is not a thing, or an object but a way of life. When one is said to have this it means that they are at the highest level of society, and borderline a god. When one has “The Dew” they also are pushing an unfathomable amount of P.
The act of taking a piss and when done,vigorously shaking the penis in a up and down or side to side motion so the last drop of piss flies off into never never land!
When a man is going to "shake the dew off the lily" he is talking about shaking the last few drops of urine off his penis after urination. Euphemism for taking a piss.