Adjective
The word is derived from dirty
What the country needs is dirtier fingernails and cleaner minds. Will Rogers
Every dollar spent on nuclear is one less dollar spent on clean renewable energy and one more dollar spent on making the world a comparatively dirtier and a more dangerous place, because nuclear power and nuclear weapons go hand in hand. Mark Z. Jacobson
I'm old enough to remember when the air over American cities was a lot dirtier than it is now. P. J. O'Rourke
My mind is no dirtier than most men's. I am honest and I say it. Fantasising is a common phenomenon and there's no censorship here. Khushwant Singh
If you properly clean a room, it gets dirtier before it gets cleaner. Chris Rock
Just two days in Manhattan and you find yourself looking for a place to wash your handkerchief after you wipe your forehead and it comes away black. Is there a dirtier or more fascinating city anywhere in the land? The answer to both parts of the question has to be positively negative. Herb Caen