WATCH THEIR STEP

(informal) be very careful not to make a mistake, not to offend someone, etc. —OEC - Ron's Journal 38 App Mar 91

(informal) be very careful not to make a mistake, not to offend someone, etc. A Massachusetts appeal court justice found Scientology to be a bona fide religion and instructed the lower court to watch their step in adjudicating claims involving the Church to ensure the First Amendment rights are not trampled on.