The nasty thought that perhaps the new car might receive priority over herself crossed her mind.

Which led to a particularly nasty thought, one that offered a possible answer to the "Why?"

Only a very nasty thought would rip grass out of its home.

"Do you mean to tell me we were actually attacked by a nasty thought wrapped in dirt?"

I think you have some very nasty thoughts in your mind about me!

This was a nasty thought, and one which Sophie had tried not to think about up to now.

Unless I do something wrong or think nasty thoughts, nothing unpleasant can happen in the world.

Keep those nasty thoughts about my wife out of your mind.

And then a nasty little thought popped into her brain.

A nasty thought came to him then, and he made haste to correct himself.