He had a splitting headache and a foul taste in his mouth.

I wanted to spit out the word so I'd never know its foul taste again.

The foul taste of magic was still thick in the room and might be dangerous.

People do not really get it and you will leave them with a foul taste in their mouth.

Which was exactly the point that caused the foul taste.

He awoke before dawn with a foul taste in his mouth.

"I have a very foul taste in my mouth for some reason."

Such business always left a foul taste in his mouth.

It, or something, had left a foul taste in his mouth.

There was a foul taste at the back of his mouth.