1.   Yeah, drops and this revolting cream that smells foul!

2.   But judging by a cursory look at the available evidence, this operation smells awfully foul.

3.   But when they merely smell foul, his campaign is inclined to take the money and run.

4.   Or telling someone how foul they smell.

5.   The liquid smells foul.

6.   It was not very big, but it hurt and smelled foul.