look over your shoulder
look over (one's) shoulder
1. To be vigilant for some danger or harm that one suspects or fears they may encounter. Likened to literally looking over one's shoulder to see what is behind or following them. He may have escaped the police for now, but he'll be looking over his shoulder for the rest of his life.
2. To monitor one's actions, activities, or behavior to ensure it is correct or following a prescribed standard. Major corporations are opposing the legislation, wary of having the government constantly looking over their shoulder.
look over your shoulderbe anxious or insecure about a possible danger.
1990 Daily Star The chief executive…toasted the lifting of the takeover threat. ‘Now they can get on with running the business while not looking over their shoulders,’ says one city analyst.