The ultimate insult. It is used for a person that causes complete disgust. It parallels a diseased penis. It can be used for either gender because the it is not referring to the dick itself, but rather the drip caused by the diseased penis.
Person 1; "You are an offense to humanity, to civilization, to everything that is wholesome."
Person 2; "That may be true, but you are nothing but a dickdrip."