Dirtothy is a character who features in a story told by Oscar to his niece Irvine in an episode of Sesame Street.
"The Wizard of Blaahs" follows Dirtothy, a spoof of the character Dorothy from The Wizard of Oz, on her journey to the land of Blaahs, which is made entirely out of trash. All is well in the land of Blahs until the Trash Collector of the East and the Trash Collector of the West come to take some of her trash away. Without thinking, Dirtothy douses them with water, which melts them, as they were made only of dirt. This made the citizens of Blaahs happy, but Dirtothy, being a Grouch, didn't like it when others were happy and returned to her home to live unhappily ever after.