Google: "What is the role of a dumper?" >Mainly used on the construction site, dumper trucks (aka "Dumb Trucks")are used for the transportation of various loose materials such as sand, earth and gravel Dumper/Urban Slang: >A relatively large ass, usually of the feminine genders, more specifically for the part where the main ingredient for fertilizers may exit. >A cigarette recycled from another person's cigarette >Illegal litterers. Butttttttt.... The most common use for the word with the most associa...