As people prepare to go, they take on an uneasy, shifty look, and start checking prices.

There was a shifty look in French's eyes as he made his last remark.

He had, she maintained, a shifty look about him.

They looked at one another, shifty looks, gazes which glanced away from eyes and over shoulders to focus on distant things.

Giving a shifty look over his shoulder, Rigger saw that no one was watching.

One of the bandits got up and started to get a shifty look in his eyes, as he made eye contact with the other bandits.

The fellow had a look like a fox terrier, shifty in reverse.

The Shark got a shifty look and tightened the hold on his package.

The shifty look in the dark eyes was gone.

You sound vague, and you've got that shifty look on your face.