A reusable dumpster bag that can be rolled and unrolled for storage and setup, and is configured to be emptied via the bottom of the bag. The dumpster bag has four sides defining an open top portion and an open bottom portion. A rear side of the dumpster bag is configured to wrap around the open bottom portion of the bag to define a temporary bottom surface adjacent to the open bottom portion. Strapping is disposed on the rear side of the dumpster bag and extends from an upper portion of the dumpster bag along the length of the rear side of the bag, wraps around the open bottom portion of the bag, and is removably secured to one or more attachment portions on the front side of the bag. The rear side of the bag can be selectively released via a quick release shackle having a pull cord.