Sadie Muntz was a vagrant lady, who got hit by a car, driven by business man Clarance Rigid, while walking in an alley. Unnoticed between the trash for several months, her rotten corpse became possessed by a spirit.
Sadie Mutz was created by Alan Moore.
The spirit collected trash from all over the city to make up a physical body. It hassled the citizens of the city until Mr. Monster released it after reciting a spell. The spirit returned all the trash to its rightfull owner, killing Sadie's murderer Clarance Rigid by hurling his trash at him.