1. An aftermarket fuel tank on a Torana.

2. The female genetalia that resembles an aftermarket fuel tank when bent over, and viewed from behind.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.

Although originally from the auto-motive department, drop tank is used to describe a womans genetalia when she is wearing tight leggins.
Not to be confused with camel toe ,drop tank is just a bulging type pubic area and not the traditional bulge with a split.

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.

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.

one who used to weigh 40 kilos at about 5 feet tall. they now are the same height but are an extra 25 kilos heavier