Dirty

1. Unclean; covered with or containing unpleasant substances such as dirt or grime. My wife does not like to drive a dirty car.
2. That makes one unclean; corrupting, infecting. Don't put in your mouth, son, its dirty.
3. Morally unclean; obscene or indecent, especially sexual. He tells dirty jokes.
4. Dishonorable; violating acceptable standards or rules. He used dirty tricks to win.
5. Corrupt, illegal or improper. I won't accept your dirty money.
7. Out of tune. The G string of his guitar sounds dirty.
8. Of color, discolored by impurities. The old flag was a dirty white.