A female's droopy dangling undercarriage sometimes caused by labial cellulite. Normally associated with Fupas and commonly mistaken for cameltoe however, a droptank displays little or no labial cleavage due the buildup of vaginal sap; a symptom of prolonged cooch dormancy.
"I went diving for a bearded clam when all i had to was reach into my neighbors droptank."
Person, generally female that is extremely bulbous in shape. One that resembles a water tank. One that is fatter than they are tall and would probably have no hope in pulling a root. Person abundant in fatty deposits or who could feed a third world country for several days. Amy Rigden. Slang: Droppie.