1.) An All-Purpose rag used for various things around the house, such as: washing windows, washing your car, wiping down things in a tool shed. The rag is something that would never be used on a human body or on anything like dishes or in the bathroom no matter how many times it is disinfected and washed.
2.) A person, that like a DIRT RAG, is all over everything and everyone. A promiscuous person whom has been with various other promiscuous persons, whom should never have any sexual contact with anyone for fear of passing along whatever dirt or disease he/she is covered with.