The fellow at the gas station said the oil was pretty dirty.

The best way I can see to get that information out soon involves a pretty dirty trick too.

But I don't know if you want to read some of them-they're pretty dirty.

He had had mock fights enough, and some of them pretty dirty.

All clean and smart on the outside - but at core a pretty dirty sort, don't you think?

Well just take all the, it's pretty dirty, look at the stones.

There was really no chance of taking any quality pictures out of the windows as they were pretty dirty.

The water had looked pretty dirty, so they'd changed it themselves.

Mind you, the fellow in question had put up a pretty dirty deal.

They think you don't have anywhere else to go, the dirty work can get pretty dirty.