A person that not only lives but aspires to live the main stream life. This includes a boring job done without passion, 2.4 children, an SUV and a house in the burbs. They just go along living out their lives as a backdrop to history and a study in the mundane. Originally coined from the industrious characters from Fraggle Rock that just went about their business mostly oblivious to the goings on around them.
She used to have a passion for science and she was going to change the world but somewhere along the way she got tired and turned into a doozer.
I used to bust my hump to get ahead but I decided to take the path of the doozer.